I'm rather picky about my underwear and have found these to be excellent.  There's just enough spandex to provide a lot of support to keep you where you are most comfortable, and not so much that they don't feel like a good comfortable cotton.  I don't have any problems with the bands curling or folding through the day and there is minimal (though some) ride up the legs.  For me the best part is after I put them on I stay where I'm comfortable and don't end up sitting on important parts :).  I have been replacing all my old jockey and hanes with these and try to not use the other brands at all since these are so much better.