On the whole, I would say that Neverwinter is a B-grade MMO. The game looks decent enough. The character models aren't the best. Classes are hit and miss. The mechanics are decent enough, but nothing amazing. The UI is a bit cluttered. It just doesn't have that layer of polish that you expect from the top tier of MMOs. As well, the monetization scheme has the potential to be very annoying.
However, the Foundry is the wild card here. The Foundry has vast potential. But it remains to be seen if that potential will be realized.