Personally, I own the Uno Synth and like it a lot. I think it sounds pretty great. I had the Uno Drum and returned it pretty quickly. It’s just noisy and not in a nice, lofi kind of way. The Synth has weird glitches that I don’t particularly mind for my purposes (run from my Digitakt to play baselines). But I wouldn’t trust the thing live. I just don’t think they’re well built.
So yeah, I wouldn’t recommend them. Selling them is also an issue since transferring registration isn’t straightforward. I bought mine second hand from Guitar Center and got the impression that getting a registration number would have been an ordeal if I would have bought it from a private party.