First the positive, it rolls easy, for the first year. Now the negatives. 1- It is too high to move around by yourself, I'm 6'3" tall and ended up shortening the legs. 2- The seat center pad falls through no matter how you place it, I replaced it with a solid seat. 3- It allows water to collect inside with no drain hole at the bottom of the legs. 4- After 16 months of use one of the casters became very hard to swivel. I took it apart and found it uses a 6201-2RS ball bearing to rotate. The design allows water to get to the bearing. The water manages to get past the upper seal and gets trapped by the lower seal= rusted bad bearing. I'm going to replace them all with stainless steel bearings. Man this chair has been a lot of work!