Well first off, the customer service!! They have A+++ customer service. EVERY time I come in I somehow find myself having a 20 minute conversation with the employees about interesting stuff, not your typical shoot the breeze talk. I've even befriended and made lasting friendships with the employees! (Shoutout to Daniel and Luis!)
Secondly, the new downtown location is soooo much better! It's a lot bigger, more organized, and overall just has a better feel to it. My only complaint is the vintage section - it's TINY!! Literally only about 20 pieces, if even. However, they are all good picks and reasonably priced. That goes for the entire store - They have a good inventory and reasonably priced. Sometimes you're lucky and can find tees for $6 - once I found a Marc by Marc Jacobs laptop sleeve for $14!
The selling/trade is pretty typical - 30% cash or 50%(?) trade credit. It seems there's no real standard, they pick and choose randomly. So go in with low hopes, honestly you'll probably be disappointed.
I'm giving 5 stars because the awesome customer service and reasonable prices. Just remember they're a business and don't HAVE to take your clothes if you're looking to sell.