Neverwinter isn't very good. It's not bad, either.
The tutorial gets its point across enough. The combat has to be one of its commendable aspects, it's alright, but I don't feel the necessity to praise it. I absolutely cannot stand the graphics and I believe the story, revolving around undead and dragons, is nothing extraordinary.
So the big question is "Should I try this?"
It's free, and you're reading my review, you can't convince me you have anything better to do.
If in doubt, give it a shot. But it's not a game I would wholeheartedly recommend. It's not a bad game - however, it lacks the appeal and polish that many other MMO's out there tend to have.