I've been here twice. I find that the girls working here are incredibly friendly and helpful!
Browsing through, they have a huge selection and everything is organized very, very well. Prices are generally decent too and you can score some expensive brands for cheap.
Selling wise, they do truly only take things within 2 years old. And I find they don't care as much about "name brand", as they took many of my Forever 21 things over more expensive brands. You also do have to keep in mind that they do sell things for cheap, and they only give you 30-40% of their selling price, so don't expect to make much money.
Overall I would come back to buy and sell :)