After purchasing these, I can see the disconnect between the 5-star and 1-star reviews. The skates themselves are designed & constructed well, but the wheels & bearings are a bit low quality. I use these exclusively on an indoor surface and wore out the original wheels after 9 hours of skate time. Granted, I’m over 200 lbs and impose more force on the item than a child or lighter person, but I had ‘coned’ those wheels after the 1st (3 hour) session. After 2 more sessions, two of them were worn down to the hub. So I had to replace the wheels, but purchased new bearings as well and it was only then that I realized how smooth good bearings should roll. I replaced the wheels with a slightly wider ’85 hardness’ wheel and under the same stress the new ones are showing NO signs of wear after more than 50 hours of skate time. If you get these skates, be prepared, you may be also buying new wheels and bearings sooner than you think.