My issue with the OP-1 is that it's fun. And that's about it, you can't find anything exactly like it because it doesn't do anything super well, it's a very fun portable synth/groovebox and with its original price it deserved all the praise but after the new parts sourcing almost doubled its price I don't see any reason to have it, it does a lot of stuff but all of them are a bit half-assed and at that price point I don't want half-assed sounds.