I remember Rapp and Simon Whitfield mentioning there is more to gain from using them before rather than after a hard workout. I had a set for a while, I sold them, nothing that a good pair of compression tights won't do.
Who cares :)... they feel so good.
I bought mine here used on ST. I figured I would give them a try... and if I didn't like them I would just resell them. After having them for a month... my wife, daughter and I fight over them every night.