As I mentioned yesterday in my fortnightly update, I'm interested in starting to track my series and while initially I was going to just track on my own, I decided to give the website fictfact a try because I had heard a lot about it.
Overall, I like it. Most of the series were accurate, but the first one I looked up was my favorite, Dragonriders of Pern. I'll be the first to admit that the series is difficult to figure out. I picked up book #11 or something first and had to read a lot to get caught up. However, this is the page for Dragonriders of Pern:
If you know anything about the series, you'll know it's insanely inaccurate. I sent them a link to a pdf from the publisher with the recommended order. It's not fixed yet, but I don't know who screwed it up that badly. Over half the books are missing and People of Pern was just a companion book and has been out of print for a while.