Updated:  Been wearing these exclusively for 2 weeks.  I am fidgeting at my desk as they ride up.  I washed them once they appear to shrink dramatically.

I wear a 32 inch waist pant, got a medium, fits nicely.  In the last few days of testing these, I have made a point to try to be considering how comfortable they are or are not.  The only problem is, I keep forgetting that I am wearing them.  That is how underwear should be.  I do not want to know that I am even wearing it, one way or the other.  Once I verify that they can survive a few washing machine cycles un-phased, I will retire my old underwear and buy another pack of these.  I also think the price is great.  luxury underwear gets a big advertising budget, and I doubt they are that much more comfortable than these.