Eh, it's ok. Baccano! (made by the same guy) is vastly superior. Durarara!! got kind of stale about halfway through the first season. I haven't seen the second season.
You should know with Baccano! that you can't really judge this guys stuff until the end.
OT: For me it's been great. I don't like to hype stuff up because then it rarely lives up to expectations, it's always better to go in blind I find. It gives you an unfiltered watching experience.
I watched until the end of the first season (24 episodes, I think). I didn't really think it was anything special. Are you saying that I should watch the second season?