These boxer briefs are very comfortable.  I'm 5' 11" and weigh 160 pounds---the medium size are very comfortable.  The large size would probably be too baggy.  I purchased 4 pair of white briefs from Amazon because they were the only company that sold the color "white".  I purchased 8 pair of briefs [mixed colors] from Kohls because they were the same in every way as the ones from Amazon except the ones at Kohls were "buy two pair for $24 and get the next two pair for $12".  If you spend over $50 at Kohls they will give you a coupon for $10 off the next purchase.
I have owned them for 3 months and like them very much---this is winter so I only hope I like them as well in the summer.

An update:
I now have owned these briefs for 14 months, and still like them very much.  The only negative is that the elastic has lost about 5% of their strength.  Which, is not too bad because they are 95% as good as when they were new.  Bottom line is that I like them---they are still tight---they were not too hot during the summer---they hold me in and the fabric is still firm.