Solid go-to synth
I picked this up after dabbling with the System1 VST plugin, and having a need for a live/working Synth.
It is one of the few knob-per-function synths you can buy, and it's at an excellent price point. Most of the complaints are valid: The synth offers only 8+1 patches, and the 25 keys are a bit limited. However, while a lot of people complain about the key travel, since it is not velocity sensitive I actually really like their feel. They have a 'clicky' feel to them, which is a very stark contrast to the mushy/spongy feeling I get with a lot of midi controllers.
The tonal range on this synth is excellent for an analog modelling synth. From low to high, you get a really good body out of any note and patch. You can test the lows easily by turning off OSC1+2 and just cranking up OSC3 (sub) and going as low as you can, it still works. Go the other way, setting OSC1 to a square and cranking up its mix before going for the highest pitch tone you can do, and you still get the same uniform behavior. The synth is very repeatable and consistent!
The arpeggiator is nice, but is a bit disjointed. Patterns are set by the wheel, but only a few sound really different from one to another. Some additional variety or means to program in more patterns would be useful.
The biggest disappointment is the manual. It's essentially one page. If you're after a first synth, this hardware is excellent, but the documentation is very weak. Roland has a ton of Youtube videos which go into how to use the device, which I recommend!