Good news: No subscription fees
Bad news: No subscription fees (see playstation home and runescape for why this can be bad)
In addition, while you CAN single player most of it, the game will force you to play multiplayer, which is nice... if you can find the right party that is. Everything depends on a good group. Also, some of the classes are truely useless (ie most melee) for some reason, and they are constantly be pruned back more than they are getting anything good done for them. As for a lack of jump, you can get caught in the environment sometimes and it just gets annoying when that happens. It also feels like you're on rails without the ability to jump for some reason.
One of the big things it seems to love to advertise is that only has 20 levels, so there's less grinding. This sounds good until you realize that it exchanges that with constant micromanaging of only 8 skills every single time you enter a town. And the grind doesn't go away because the best armors in the game are absurdly expensive and need several components to make, meaning you will be grinding, and selling, and bartering to finally get what you need.
I would say it's worth $20, but if you don't mind paying subscriptions, I found City of Heroes/Villains way better as an MMO.