I'm 6' 1" and have a 33 or 34 inch waist.  My only complaint about these pants is their length; I got the large and they're at least three inches too long.  I have to admit, since I'm not planning on wearing them out and since the only ground they'll drag on is my carpeting, it's not a very strident complaint...but still, they're long.

The reviewer who compared the weight to a heavy t-shirt was dead on; they'll be perfect for fall or spring jammies.  They're comfortable, they fit nicely in the waist, they seem to be well-made, they have pockets (!!!!), and they're very reasonably priced ($25 for two when I bought them).  They're a good buy.

If I can get them to shrink in the wash and correct the one thing I don't like about them, I'll be a happy man.