i've passed on superhero TV shows since I have been disappointed with all of them except for the first couple seasons of "Heroes" and i watched that mainly for the funny Japanese dude and the sexy cheerleader girl who can't get injured.
Both DC and Marvel have seriously disappointed me with their series, but if you say JJ is ok, i'll give it it a go !
Well, don't take my word for it. There are times that I thought it was a little slow. It just isn't your typical super hero show, so I thought you might enjoy it :)