Utter bobbins.

I had three(!) in a row, and two Korg NanoPads too. They are singularly the worst quality goods I've ever had the misfortune to get replacements and then refunds on.

Dire build quality. Sketchy response - two of the three nano keys had completely dead keys, and the C# and D# on the third were hit and miss. I really wanted these to work - they looked great in pics - but in the flesh they look and feel incredibly cheap; and they just didn't do the job they were supposed to. Yes, you can argue I got faulty units - but five of them? In a row? Hmm.

I wonder how much an 80% review costs you?