Like:
- Unlike my cotton boxers where the edges need to be ironed after washing/drying, these do not (I hang them up to dry, and they dry fast)
- Comfortable (both texture and fit); not too short like many boxers
- Dry fast (e.g., after sweating from physical activity)

Dislike:
- Occasionally give me wedgies, but not frequently enough to not wear them
- Somewhat see through

8/11 Update:
After buying 3 of these and wearing them frequently during the warm summer months, I developed a painful boil / abscess on my butt (i.e. a skin infection) that was very painful and ultimately required antibiotics and draining by a doctor.  Although I can't say for certain what caused it, my research shows that nylon underwear could be a cause because it does not absorb moisture like cotton and leaves the butt more moist and susceptible to bacteria. (reference: Encyclopedia of Family Health, p. 255)  I actually bought these thinking they would wick away moisture, but they seem to have had the opposite effect.  No more wearing these!