Has anyone ever used Chegg.com to rent textbooks?

I’m looking to save some money on college textbooks this semester, and I heard about the website Chegg.com where you can rent books instead of buying them. They are a bit cheaper than Amazon and some other book sites. I was wondering if anybody has had any experience renting books from this site. What quality were the books? If you want to buy them after renting, how much more do they cost?