I bought MK7 for my sister for Christmas (She has a 3DS, I don't) and I have played it for about 4 or 5 hours or so since. It really is a let-down. The graphics are amazing and despite having hit competitive karting during the MKW era, I preferred that there were no bikes.

I've played only 2 races online, so I can't provide a decent opinion other than it seemed extremely boring to me. I like the majority of the new courses, but I think they've completely butchered some of the retro tracks (Coconut Mall looks fucking disgusting and Kalimari Desert seems.. plain).

150cc and Mirror offline modes are a complete joke. The rubberbanding in this game rivals MK64, which I thought even Nintendo had realised was ridiculous. Being green sniped off a wall while in the air is horrendously common and item rape rivals MKW online.

The unlock feature is pathetic. I found myself having to play 150cc shell cup and purposely lose just to guarantee 10 coins a race. I didn't unlock the B-Dasher or Slicks until around 2000 coins.

The TT I can't really say much about, as I have barely touched it. I've played SGB and TC only and I get bored extremely quickly, something that didn't happen (especially so early on) in MKW.

Alas, my sister seems to enjoy the game and that's what really matters - I'll be leaving home in February so I won't be playing the game after that anyway - but from what I have seen Nintendo really seems to have dropped the ball on this one.