I just made my second purchase on Thred up - so far it has been a great experience, buying clothing that is like new for a lot less than it would normally cost. I am petite, so I am glad there are petite sizes available. I also only buy clothing that is in excellent condition, eligible for returns, and from well know brands (such as ann taylor, J. Crew, and BR). I do not think I will try selling clothing to Thred up however, due to reviews that describe this as a bad experience.