It is not that good, as stated Renton is Shinji 1.5 and it's quite boring at times (Did not need to be 50+ episodes). The freakouts seem like the anime took a hit of acid and just went from there. Finally Eureka, the female lead is either emotionless/depressed/sad the ENTIRE SERIES! IT GETS OLD DAMNIT!
That being said the manga is probably better, it's darker, shorter and more satifying than the fucking super deus ex machina at the end of the anime