SUNLU Official 3D Printer Filament Dryer S4, 4 Spools Capacity, 3 Circulation Fans, 350W PTC Heater, 70℃ Max Temperature, Power Saving Storage Mode, Nylon TPU PLA PETG ABS Filament Dryer Box, Black

Overall, I’m very pleased with the S4. It does what it’s supposed to-dry filament-with the added bonus of being able to load 4 spools at once. Quite an upgrade from my old single spool dryer. Controls are easy to use, it’s not terribly loud (then again, I have an S1 in my bedroom and that noise doesn’t bother me either), and it’s very easy to print directly from the unit thanks to the numerous outlets for filament-4 on top, 2 on each end.If I have one complaint, it’s the lids. I’d have preferred that Sunlu make them permanently attached because these are a little difficult to keep on. When opening the dryer you have to push in a little tab on the lid and if the lid isn’t firmly seated, you’ll push it out. A very minor gripe but considering how well it’s built and how well it works, I’ll live with it.

Love it, great investment!!

easy to setup and use, seems to work well, used for drying PLA, did not try yet for other materials

Great device for drying filament. Handles most of the standard filament types. If you need to dry some more exotic filament get the more powerful version.

Can't even get the thing to turn on anymore. When I plug it in or flip the power switch on the back, the screen lights up for about a second then goes dark again.When it worked it seemed okay, although it's a very cumbersome device, the lid is finicky and having the rolls stored in a 2x2 setup just makes the whole thing a hassle to feed filament from.I bought this specifically because Sunlu advertises this as having a 3d-printable extension for 3kg spools except the .stls are buried on their website and the models themselves are awful with broken geometry that doesn't fit on any regular consumer printer's buildplate and the sides aren't even perpendicular so it can't even lie flat. After some heavy edits within Prusaslicer I was able to get it to print but it's still a massive waste of filament and not something I'd recommend at all. The fact that it died after 4 months is just icing on the cake.Buy a few smaller dryers for your spools and call it a day, don't waste your money on this.

I have the S4 under my Bambu AMS lite. I have to place my AMS on top of it because of the distance limitation of it to my printer. Here’s the thing: it’s a huge pain come time to switch filaments out from the S4 because I have to try to move/balance my AMS each time. I then also have to awkwardly try to keep the S4 door propped open. Okay granted, not everyone will have this setup, AND I do plan on modding this. But even so, because of the orientation, it’s very hard to see and reach the “back” side (right side) to switch filaments. I’m a short individual, but it has more to do with the way the doors hinge open. It would be nice if all sides had a window to see into the dryer through. This seems a little more complicated, but it would be perfect if all sides had a door to access/switch filaments through.All of this being said, it is a very good filament dryer and dispenser. The controls could be a little more friendly, as in, the touch screen is really nothing fancy. As far as the 4 touch buttons, they could have just as easily been physical clickable buttons with the trade off of a nicer display (or, ya know, a better door situation). Value for money: good! I would repurchase it. The way that I can set and forget and keep 4 spools ready to go at a time is fantastic. The auto on/off feature based on the current humidity and temp is the best feature about it. If you’re someone who does multicolor prints often and/or prints daily, I would definitely recommend this dryer.

Works as advertised.Very quiet.Like the various programming options

Works great! As to the complaints of noisy fans, the level of noise from this unit is negligible.