I bought the pair of elbows and knees for $27.XX each and they were a bargain. These are my third set of elbow/knee pads and I like them more than the previous stuff I bought. I have read some reviews about how they slip down while riding but I have not experienced that. They fit snug on me and they are not too bulky. The mesh backside is very breathable for warm rides and the impact absorbing material is pliable so it will help when you take a spill.
Overall, I would recommend these to a friend as I am beyond satisfied with the purchase. I checked around and at a price point of approximately $55 for a set of pads, these can't be beat.