I found the one I had on loan for a day quite good fun. It wasn't quite run in, so I didn't have the full rev range to play with, but it was fairly nippy considering.

Overtakes needed a bit more planning than on my old Fazer which it was replacing for a day as the MT-03 was down on power quite a bit, but there is definitely fun to be had on one. And of course it takes a good rider to make a small bike go fast so it will vastly improve your forward planning if you're used to a litre bike.

They do seem to be a bit vibey (being a single) the one I had shook it's number plate free somewhere between Andover and Newbury. I went back to look for it, but never found it ;D