Usually I buy packs of less expensive socks, but I decided to buy these since I was starting to increase the length of my long runs.  Socks that feel good for 5 miles won't necessarily feel good for 12+, so I figured I needed to spend a little extra money.  And I really do like these socks, I would give them 4.5 stars if I could (you'll see why not 5 stars below).

Pros:
-cushioning under ball of foot and heel is GREAT!
-comfortable
-don't slip down into your shoe
-almost never get blisters on long runs anymore
-I got the baby (carolina) blue color and really like this color option
-I have been wearing these socks once a week (for long runs) for 10 months now, and they are still in good condition.

Con:
-sometimes get irritation/small blisters on my second toe.  However, I don't completely blame the socks for this since I do have a really long second toe.  (Also, it is not so bad that I feel the need to get different socks)

Also, I wear a women's size 8 and "small" fits well.

Overall, good socks.  Worth the money to me.