I also use thriftbooks (almost exclusively) and while I would recommend it, I haven't exactly had a similar experience. I love the app/website but it's pretty common to get a book in worse (sometimes better) condition than advertised. I made the mistake of buying some books as presents last year and several of the "Like New" were falling apart and not giftable. I've probably bought somewhere around 200+ books from them in the past 2 years and had to buy craft glue and book tape really early on because of all the repairs I had to do. I've also received the the wrong book occasionally, once they sent me the third book in a series instead of the second and another time i spent extra to get a first edition (advertised as very good condition) and they sent me a damaged 3rd edition (I was able to get a refund for that though, and they didn't make me send it back). It's a fantastic option for cheap books, but don't expect the quality control to be perfect