I have the orange pair. They are awesome. I cannot tell a difference between them and Normatec (i tried them at an expo). Also these have higher mmHg than the Normatec. I don't know what they do physiologically, but they feel awesome after a hard workout. My only complaint is that they turn off after 10 or 15 minutes and you have to restart. It's easy to restart, but it interrupts my nap.