I went to the Oxford street branch today.
I dont like the Wheel personally, i dont think any MKDS players mainly will like it either.
It feels all weird after being so used to playing normally, the handeling is horrible too.
I was in 1st on my second attempt but then when i was cruising towards the finish line i turned around to tell my freind i had won (moving the wheel in the process) making me hit a wall and ending up in 6th in the end.

I was pissed off

But meh, the wheel sucks IMO.
And when i tryed to MT its like the kart just hopped back out of the MT, sorta like it does when you have a broken R button or something.
Hopefully the Gamecube controller will make it better.
Im still buying the game for sure.