Seems fine. They say "48 hours" is the typical response time. The magnets are super strong and the unit will carry a lot of weight without slippage. All in all, this is a solid offering and my go to recommendation. Usually, I like to buy brands like Anker and others that are known to produce high quality without charging a lot, but, I picked up one of these (at the shockingly full price of $300, yikes! I have worn FitFlops in the past and normally they are the most comfortable sandals. They are just okay not that comfortable and it okay for work not for walking long distance plus they are very slippery and i waste lots of money on these trainers £60 I wonder if they came in half sizes, they would be more true to size. Anyway I?m returning it ASAP. He doesnt have a closet in his room and rather than fold and stash everything, we put this on the back of his bedroom door.