To be honest, I read the last book when it first came out and that was that, didn't really go back to it, so some of the details are a little hazy for me. :P I remember feeling that the final battle was kind of... bland, after all of that buildup in the other books. But the series was enjoyable overall. I'm glad that Murtagh didn't do the "bad guy sacrifices himself to atone for his wrong doings" stunt, and I guess it was pretty cool seeing Eragon become the keeper/mentor of all those dragons.
I really need to get on reading those Lord of the Ring books. -sigh-