So far so good. I've ordered over 25 books from thriftbooks.
Pros:
Customer service has been very good
Got some great deals on some great books
Overall happy with the condition ratings
Cons:
Pricing - some books are priced WAY above what they retail for or sell on Ebay, not sure who sets the pricing but some books really make you scratch your head
Shipping - Slowww shipping. If you're on the East Coast expect some slowww shipping, quickest I've received a book is a week, most are 2 weeks and some even longer - don't expect Amazon Prime delivery.
A lot of the bad reviews on here are obviously privileged morons - the company isn't GradeANewBooks.com, it's a thrift store company, my god. Disinfect your books and move on with your lives. Overall, in my opinion, you get what you paid for and then some in most cases. Have had a few duds and 2 wrong items but overall very happy and it upsets me that people bring down this THRIFT store company with overly dramatic bad reviews.