Logitech ERGO M575 Wireless Trackball Mouse, Black

Great product. Bought to replace the same previous model that had lasted for over 10 years. Can't fault Logitech.

I've been using it during more than a year for work (so 8h per day) with no issues.

So I will start this review by stating that I ordered this trackball by mistake when searching for the old MX Ergo in a rush, picking a 3rd part seller (usually a mistake as well) and ending up with this monstrosity. I have been using the Logitech trackball from the M570 which I several, but they all had the same issue with poor micro switches on the mouse button, I upgraded to the MX Ergo 5 years ago and its still going strong. I needed an extra trackball and wanted the same MX Ergo, which has been retires but I thought I had found old stock, I must have miss read and I have this Ergo 575. Where do I start, well its flat, this means that your hand and wrist are at an uncomfortable angle, and not gaining the benefits as much as they should for using a trackball. But worst still is the fact that its made is a silk finish which is just slippery and I find myself constantly having to re-adjust my hand. Again, this looses ALL the benefits of using a trackball. The final issue of this "Budget" version, which is still over £40 is that it is not rechargeable or has the ability to connect to two machines. Considering you can get the latest MX Ergo for £80 this is simply a waste of money. I am kicking myself, had this been purchased from Amazon I could simply have returned it and purchased the correct one, but because of these dreaded 3rd part sellers I am now stuck with this useless lump of plastic and will be spending a further £80. I guess at least my cat will like chasing the ball around the room and I have 1/2 the batteries I need to replace the ones in my remove when they go flat!