I still have 4 floors left to put elsewhere. I didnt end up with any blisters but I can see how you might get some if fit is less than ideal. Battery is definitely at least 7 hours for sure, seeing exact percentage is a nice touch. I ordered 2 sets of 2 in gray. Passen nicht mehr. After that is was easy. Not going to review trap bars in general, because if you are thinking of getting one, you probably know the benefits and limitations. One slipper had a flaw, the footbed was not glued to the top of the shoe. I encountered a fitting issue with one of the pads but easily remedied with a nail file. Two pairs from Amazon via reputable retailers and one pair store bought by my wife as a gift.