I am what you might call a combat sleeper, I'm active throughout the night and my wife says it's like I fight a war.  These sheets started out working for us, however, now do not seem to stay on my side of the bed the entire night.  This is disappointing as we both like the feel and comfort of the sheets and pillowcases.  May look into getting some sort of "tie down" for the fitted sheet and see if that will keep them on.  Otherwise we like the sheets and they, minus the problem I mentioned, are worth the money.