I have found some are made better than others but more importantly some are more comfortable than others and part of that comfort is due to your particular body and chair design. I have tried some that others swear are great but something just wasn't right about them for me to stiff, to low, to high, to narrow or whatever. I would recommend going to any or several of the locations mentioned and sit in them and find the one that fits your body the best. We have some that are about 15 years old and they are in need of replacement. They fold up in bag but they also have a foot rest which is adjustable and removable. I would buy them again in a minute but haven't seen them in years.
