A friend of mine gave me this as a late birthday present. I was interested in it but not so much that I wanted to buy it on steam at release. As a former WOW addict of 4 years, I'm understandably apprehensive when it comes to getting involved in a new MMO (though I am waiting for TOR to be released).
The game is entertaining but it does have issues. At launch the chat system was completely broken. This alone is a glaring issue for an MMO as the whole point of the game is to interact with your friends, guildies, and people you group with. Unless you have a dedicated vent server it was difficult at best to communicate with others. Luckily this has now been fixed.
DCU Online has many other issues, ranging from inventory glitches, talent point loss, pvp imbalances and my personal pet peeve: only having 6 slots available in your action bar for abilities when your character may have double that or more to choose from.
It does have some good to it though. The choice between flight, super speed or acrobatics is nice and the depth of character customization was very surprising. The combat system is different in a good way but needs a bit more depth in your attacks.
One very cool thing about DCU that I wish WOW had is the ability to stick with a specific look you like regardless of what gear you are wearing. There was nothing worse in WOW:The Burning Crusade than turning in your sick set of Warlock tier gear for a set of blues that made you look like a circus clown.
Overall the game is decent but I honestly don't think it has much staying power. Level cap can be hit in a few days if you grind enough and once you are 30 there just isn't enough to do. Combine this with Sony's reputation of driving its MMO's into the ground and I think it is safe to say that DCU will share the same fate as Age of Conan, Warhammer, Lord of the Rings, et cetera.