I'm a runner who didn't want to pay $35-$70 for a pair of compression socks specifically marketed to runners.  These were well worth the money!  My legs feel instantly better when I put them on and even better when it's cool enough out that I can wear them while running.  The extra padding on the feet are nice too.  They look and feel just like regular sport socks except they are tight.  They can be tough to get on and off, but well worth it!