I’ve had the first gen Sunlu S2 (silent one) and thought the touch buttons worked very well. But I hated the filament feed angle, and feeding it through the lid while holding the lid. But it wasnt as bad of an experience as with my Eibos Polyphemus - using the front feeds I melted my filaments and jammed two extruders at once, back ones are hard to reach, and feeding through a lid that comes off altogether is a total nightmare. And it didn’t reliably do its headlining feature of rotating my filament. I’ve had 4 filament dryers now. How hard is it to make a good filament dryer with all of this feedback data? I don’t want a janky food dehydrator setup and I am prepared to pay a few more dollars for some nice buttons. I don’t need wifi or an app for it. Could someone at Bambu take it up as a side project? Or hire me - I’m a product developement engineer.
Hello. I am also between the S2 and the Space Pi (single). I have read that the space pi has problems with (too) hot spots directly at the heating? The new Version of the S2 has a fan, did improve? Has anybody new information?
thanks for the review, is the dryer still in your possession, still happy? I was wondering if noise levels were an issue?
If you were addressing that to me, since I started this thread, I still have it and the Creality PI does dry filament.
Outside of that, if you don’t mind the noise, the flaky touch screen, the fact that you need to modify the hinge mechanism and the fact that you really can’t go by the display accuracy, what’s not to like? 
Bottom line was that at $65, it was the least shittiest choice on the market that went up to 70c. However, it’s a shitty design for all intents and purposes. But what choice do you have. At that price point the Sunlu was far worse.
What do you mean by modify the hinge mechanism? Side note, On my 4ish month old Pi Plus the plastic on the door arrives slighly bent so closing it is very finnicky.
The hinge mechanism is woefully designed. It’s as if the design house they used didn’t even 3D print a sample because there is no reason for a door to swing back that far without a spring or at least a stop mechanism. So necessity being the mother…
…and don’t forget about no cardboard spools or you’ll have to clean up & increased fan noise. You will wake up in the morning to what looks like sawdust all over the inside.
That’s curious, 90% of my spools are cardboard and I checked just now and there is no internal dust whatsoever. What brand(s) of filament did you experience that with?
I’m not 100% sure now as it’s been awhile, since I got my PI.
But I’m pretty sure it was eSun.
I was doing a 3 day print & the dryer was behind the printer. I could check the print from the door or by video, so I couldn’t see the dryer. When I would walk into the room, either I just didn’t notice or it happened on the last day.
Anyway, 90% of the clear case was covered in dust, it looked like mud from the outside. It was pretty easy to clean up as it was just dust. But I will never put another cardboard spool in the PI. I have two S2’s without the fan that will work just fine. I think because of the long print & the fan it just started tearing the spool apart. All the printed info on the side spool was fuzzy looking 
I made a comment about it after the fact. I should have thought about taking pics before I cleaned it up. This was the reason I thought my fan was blown, when I took the PI apart there was no cardboard dust anywhere to be found.
First of all thank you for the detailed review. I happen to own a Creality dryer. Just wanted to add to your review after using for 6 months, that the fan randomly switched to an awful loud mode probably 70% of the time when I start the drying. This started 2 week after I received it. The humidity sensor never goes under 15%, but it will dry your filament. Also ever 30-40 minute or so you have to open the lid to air out the moisture… There is a great moisture basket mod on makerworld, that improves that.
Overall while better that the Sunlu, it is a below average dryer. The screen is great I have to admit that.
Solution for the fan noise is to order a quality replacement fan with better bearing.