I think they’re great. Once they’re claimed, they just show up in my account, and automatically apply when I purchase something. I can also look up the balance easily through my account, so I know what my limits are. I also like the fact that I can use them to buy used books sold by other merchants too, which helps me buy the hard-to-find books I like. So far, I’ve used gift certificates for books and DVDs and have had no problems.