Fitbit Sense Advanced Unisex Smartwatch with Tools for Heart Health, Stress Management & Skin Temperature Trends```

It took me 2 weeks to decide whether to buy the Sense or not. I read uncountable reviews and was very hesitant. Since I own a smartwatch but wanted a really good health tracker in addition I thought I just chance it and try the Sense 4 weeks ago,At first I had problems setting it up. It just wouldn't connect to my phone. I tried for hrs and googled. After midnight I found out that I cannot have 2 watches paired with my phone. So there was nothing wrong wit the Fitbit Sense, I just had to unpair the other watch, I then reset the Sense (long press and hold of the button/indent for more than 10 secs) and voila, it worked a treat. In the meantime I had already started return of the item and printed all documents ;-)After 4 weeks I have now cancelled the return because I am 100% happy with my purchase.If you are a serious runner, you wouldn't go for a Fitbit anyway,right? You might go for Garmin or Polar. The Sense is ideal for those you want to track steps, sleep, HR, ECG and so much more. The SpO2 will only be measured during the night so you can see the value next morning. This is important for me because I have slight sleep apnoea and I like to know if it goes below 90%.Yes, in order to see the SpO2 you need to choose a certain watch face, I don't see a problem with that. If you need SpO2 monitoring all day you can buy an SpO2 metre to clip on the index finger.When you use this special watch face you can tap on the screen and it switches from SpO2 to HR, another tap to steps, next tap to active mins, another tap to floors ( the only one I switched off. I don't use it )I have no problems with the indent /button at the side. It is just a matter of getting used to it. I have NEVER experienced that by bending my hand I accidentally would have hit the button. That never happened.The HR is very accurate, I compared it with the HR my Samsung watch showed at the same time(not connected to phone)The sensors have been very reliable .Some complain about lagging. I have no problems with that. It is a new watch with new sensors , there will be updates soon and I am positive that this point will be addressed. I do believe it depends on the phone the Sense is connected to and the firmware version of the watch. I had an update 2 days after set up and my watch works perfectly fine.Battery life is amazing. with 3 x 30min jogs with GPS every week and many notifications from several apps and even accepting phone calls my Sense last about 4 1/2 days. The charging speed is outstanding, it'll blow you away. 10 mins from 4% to 25% keeps me going all day if I forget to charge in time. I don't have to charge over night and miss out on sleep tracking. I charge when I'm watching telli. The charger is a strong magnetic one that attaches easily to the watch and doesn't fall off.The wristband is like most others : the silicone-sweaty-sort-of-thing. This is one thing I don't like but I found an elastic fabric one on Amazon.com and I just love it. I am hyper sensitive to all rubber/silicone so the elastic one is brilliant for me.What I also don't like is that to some of the features in the app you have only access to with Fitbit subsciption. This is included in the purchase for 6 months. I will not renew it and will be happy to read the stats, after 6 months I'm sure I know what they tell me.So as you can see , I am happy with the Sense and am confident that with future updates it will be even more exiting. We should be a bit patient, everything new can have hickups. I only encountered one: after changing the watch face, suddenly there were no data on my watch screen, it showed the symbol for steps but no figure, yet in the app all steps were shown. A simple reset of the watch (press button for more than 10 secs, hold and wait for Fitbit sign to appear) solved the problem.At last: I live in Ireland and my Sense already has the ECG feature which works a treat. Some countries will get this feature with a next update, as I understand.

So I got this delivered on lauch day (25th September) and have worn it every day and night since.I have had many fitbit trackers in the past and the last one was the Ionic. I gave up on the Ionic after a year because I had so many issues with it, the worst being it would loose connection with my phone for no reason and then I had to unpair, delete and re install time and time again.I have been using the Samsung galaxy watch active 2 since and it was an excellent smartwatch but its fitness tracking was not good mostly because of the calories burned during exercise which was so off.I was excited to see the Sense on the fitbit website before it launched and I decided to treat myself. I always buy from Amazon because their customer service and aftercare is excellent.Putting it simply I love this watch. It looks great, feels premium and the screen is bright and clear. I'm fully used to the haptic button and prefer it to an actual button as it means that the watch will be better protected from water.My only problem is that when doing strenuous exercise like spinning the heart rate sensor takes a while to register the high heart rate reached, sometimes my heart rate slows a bit before the watch catches up which meand I miss out on the top range readings of my heart rate. Also the watch seems to think my heart rate drops down into the 110 to 120 bpm after an intense interval but my heart rate is definitely still really high in between hard efforts so this does bother me. My Ionic did this when I first got it but it seemed to improve over time so I'm hoping that the Sense does too. My guess is that it is something software related which can be fixed. Also when weight training the watch puts my heart rate at 110 to 120 bpm when I know that after doing squats for 6 solid minutes with a weights bar my heart rate is way higher, my Samsung puts my heart rate at 140 to 150 bpm for this. Walking seems accurate as does martial arts and kick boxing. Maybe fitbit could fix this with an update.All of the features of this watch are great and I love it. I'm looking forward to seeing what updates come in the future to improve things. I'm especially looking forward to being able to answer phone calls on the watch as this was a big feature I enjoyed with my Samsung. The new os is nice and the connection to the phone is way more stable but it did drop out once so far and I had to unpair, delete and re install then it worked. I think that fitbit might be working on stability now as it needs to be better to be able to take calls on the watch so I'm guessing that's why we don't have that function yet.All in all I'm happy despite the niggles. I find this watch exciting.Update!My sense had to be sent back to fitbit today as it was faulty. I'm very happy with fitbit customer service so far as they are replacing my sense with very little effort to action this.Unfortunately though Amazon now don't replace faulty products after the 1st 30 days. They used to replace faulty products up to a year after purchase which is why I bought it from them. I will just buy from the manufacturer in the future now. I have to say the Amazon customer service lady was excellent, not her fault that the procedure has changed. Just thought this might be an important point to make incase anyone else buys from Amazon because of the returns policy which has now changed.