I went to the last one in Hillcrest and it was a lot of fun. We got some great deals. It is REALLY crowded. I would say it is worth it especially if you do the 2/$20, the gift bag is just okay. Go but don't expect too much! Oh and bring cash!! A lot of the venders charge less if you pay in cash and the later you go the lower the prices.
I would not say really good deals but definitly a fun time. Last time they had Juicy Couture, Gabriella Giovanni, Eva Franco, Hudson jeans (not very good prices) those are all the names I remember. They had a lot of clothing and jewelry some handbags. You will definitly find something but not like the Saks sale by any means. It is a fun night out with the girls IMO plus it is at Sweetwater this time so that should be fun. I am sure they will have music and drink specials too.