(Spoilers here encompass the whole book, including a big part of the ending.)
There are a few parts of the story that don't quite sit happily with me

for example Eragon's transformation at the blood oath celebration

but overall I highly enjoy the story and it continues to be a part of one of my favourite series.
It also confuses me why this book has

the red dragon, Thorn, on the cover and not the gold one, Glaedr, when Glaedr is far more important in this book than Thorn...

Perhaps that will make more sense when I re-read Brisingr.