Had these for a couple months now and they work the same as they did right out of the box. They are super smooth rolling. They are FAST! if you have hardwood or tile I'd recommend a small area rug so you aren't rolling around. I'm short too so I need a foot stool so might not be an issue if you can plant your feet right on the floor. They fit perfectly right into my chair. They are made out of metal not plastic also for the brace, heavy duty. Would Recommend.