Garbage! All Nintendo mobile games suck and this takes the cake. Always on gas and sloppy steering... it's a joke.
The steering _is_ sloppy. Particularly on larger screens - it's next to unplayable on the larger iPad Pro. I gave it a chance on the phone and when you relax into the controls, it's enjoyable, if not a patch on the versions on Nintendo systems. And heck, it's still better than Mario Kart: Super Circuit on Game Boy Advance (my least favourite of all of 'em).