I bought 2-pair to wear under shorts. I commute to work and decided I needed something more supportive than a pair of Haines (or less), as by the time my backpack is loaded, it can be quite heavy with a lunch, a full-size Kryptonite, air pump, tool kit, tube, laptop, etc.
These shorts work for me on my commute, which can range from 3 to 12 miles. They fit will and the padding is great. I have only had the shorts for a few months, so I don't know about durability. In addition to my commuting, I have worn these under a pair unpadded tights on a few 50-mile rides and I was very comfortable.