As everyone else has said Elantris wasn't very good but he does improve quite a bit in his other series. Where I differ from most other people is that I tend to like his first 1-2 books in a series but then lose interest as they continue on. At the start his worlds have decent rule sets and his characters have to make due with their lot, which I find interesting to read about. But he always undermines this with power creep and the addition of some characters that I find insufferable.
I enjoyed Way of Kings quite a bit when it came out and I've read it several times but I felt that the momentum that was built up in the first book was squandered and I despised that Dragonball like fight in the sky between Kaladin and Szeth in book 2. I'm a heretic I know but hopefully that gives you some variety of perspective. Bottom line is if you like decently written fantasy superhero epics then give him another try.