Seconding a complaint-less experience with the mini plus I won here. I've made no attempt to try the TC features, but it runs just fine in wattage mode.
The only usability thing I might highlight, having seen it complained about before, is if you're the kind of person who can't resist fiddling with something that can be fiddled with, and are annoyed by it, the battery door here might be an issue.
It doesn't rattle or move around or anything, but it is perfectly balanced and shaped to be able to pull it down with your thumb, then release for it to get pulled back into place by the magnets with a solid "click." For me, I love playing with it while I'm holding it, but like I said, if you're on the other side of that coin then the mini plus could turn into a real psychological nightmare heh.