While i didn't get to spend more than 10 minutes with a pre-production Karma a while back.. i completely have to agree with you on the inteface. It is very inconsistent and non intuitive. Hell, the Riot's interface was better, and it still bugs the hell out of me everytime i use it. I really wish i had one in front of me so i could outline everything that didn't make sense about it... but the biggest i remember from memory are the way you have to select things and the inconsistency of the wheel function that you mentioned. I don't recall exactly how it worked, but something about the way that things were highlited then had to be selected drove me nuts.