80%???
I paid £35 for mine a year ago and couldn't WAIT to get rid of it, it's a rip-off even at that price.
The keys are like laptop shift keys, you can't play hardly worth a damn with ONE hand, let alone two.
If you thought that was worth 80%, you should genuinely check out the AKAI LPK25 - for £45 (£5 less than you quote the Korg), it has proper (if mini-scale) keys, and will blow your mind in how much better it works.
Korg's mixer-style nan-controller and drum-pad units are both wonderful and worth the money but they dropped the ball so utterly in making the NanoKey out of laptop shift-keys (and thus barely usable) that I'm shocked anyone who's tried to write a song with it for more than five minutes could rate it 80%.