I use to wear a normal jock and the shockdoc compression shorts are waaaaay more comfortable than the jock! I never complained with the jock until I went back to using it while my compression shorts were in the wash!
The shorts I think are very comfortable, the cup has a lining round the edges and the shorts also have a lining where the cup goes. I'm guessing to make it more comfortable so that the cup doesnt dig in which happens sometimes with a normal jock.
I strongly recommended this product! The only problem as someone mentioned is that the cup is rather large and I can only wear it with some shorts because it sticks out too much!