When it comes to sheets, we are divas.  We ain't sleeping on less than 1000 thread count.  And the last set we bought, was at Sam's club, it was $100 and lasted only a little over a year.  When I saw the price of these, I was ecstatic.  If these last only a year they will be totally worth it.  They feel great.  They smell horrid coming out of the plastic, so make sure you wash them a time or two before use.  Pretty, comfy, and will fit a very deep mattress.