I'm getting the hang of it now. So good.
I do have some minor complaints about certain things. It's stupid how you have to back out of an online room to change your character/kart. Even the host has to close him own room if they want to change. Not sure what Nintendo was thinking having them ordered backwards that way.
Sometimes the red shell beeper will sound and the icon appear, as if it's coming to hit you, but if you use the rear view mirror, it's actually targeting the person behind you. Other times, it really is coming to get you, but odd how it shows up when it's actually targeting someone else.
Also, sometimes you will fire a red shell intending to hit the person in front of you, but even if you're a good few yards behind them, it will go straight passed them and target the next person along. Seems you need to be a lot further back sometimes.
No statistics menu to see how many coins you've got so far, most used characters, etc. No settings menu to alter little things.
I even find it difficult to know which characters I've beaten cups with so that I can get all the Miiverse stamps. In the stamps menu on the gamepad, I can hardly tell the difference between the three baby girls, so I'm not even sure which ones I've done it with and who I haven't. Game needed a simple menu with their names next to the stamps. Have learned to write them down as I go now.
Not a fan of the battle courses at all. Poor decision to do away with proper battle arenas. A new Block Fort and Double Deck would have been awesome. Shame, because they actually brought back the knockout free-for-all in this - the way battle should be.
Ugh, another little annoying thing is having 'View highlights' as the default option after a race. It's hard not to keep mashing A to go to the next race, so it's a nuisance to get used to!
Hope they patch it up a little bit and add proper battle arenas and some better characters. Really want Dixie Kong more than anything.
Apart from that, though, love it!