TL;DR: If you work solo, need portabilty + playability, and aren't picky about 'weighted keys' - this is a good choice.
For a hobbyist singer/songwriter/producer like me it is just the ticket. I am not a piano player, so I don't miss any weighted keys and such - action here is pretty satisfactory for unspoilt hands of the guitar player. And it is so much better than micro 32 and 37 keys I own! Gives you a real feeling, making you actually want to play for fun, not just input notes and build chords into a DAW. Not on par with a Novation I once had, but for this price? A no brainer!
And no complaints about it being plastic-y - c'mon guys, who really wants metal and / or wood in their hand luggage?
Having the interface built-in is super convenient where space and weight is an issue. Unlike some YouTube reviewers I haven't yet experienced any problems with latency / dropouts (buffer set at 128 samples). On the other hand, I didn't try to run a 40+ tracks projects with loads of VSTs and effects thru it: it is something I do at home on an iMac and a Focusrite.
One combo input for audio is also fine for me - a scratch track can easily be done with miked acoustic guitar + voice, and when it comes to proper recording, I do all tracks separately anyway. So, if you're solo, and don't need to record your jam with a friend, no problem here.
