P-121 does have an octave shift indeed, but it's not really that easily acceptable, unless, perhaps, you're using an iOS device with it.

I believe P-121 can be an excellent choice for a gigging musician, in case of using it exclusively at home I'd have second thoughts. I know that playing 76 keys in a lot of cases I'm not able to play a final arpeggio in the end of a song without using an octave shift.