To be honest, if you have an account on a just breached site and your data didn't got leaked, it's probably a good idea to change it anyway. I still use these kinds of tools, though, but mostly because I used to make accounts on lots of services, forget about them, then get reminded again by a breach, then I usually just download whatever data I had, if any, then remove the account and forget about services for however long. The shock when I found out I got my data leaked because of the Armor Games breach...