Yep, it is a fun game. I don't imagine it will ever take a ton of my game time away from WoW, but they have definitely done a lot of stuff right. There are a number of things that are much better than the WoW equivalent:

- Character creation
- /follow - works from one end of the zone to another!
- Quest completion - if someone else is near you and they complete the quest, you usually get credit
- Character naming - name your toon anything you want, even if there are already 18 "Indigo Girl" toons out there, you can still name yours the same! No more weird characters just to get the names "Earth", "Wind", and "Fire"
- One world, heavily instanced, but you can always play with your friends (not 208 different servers like WoW)
- Flight from level 5 on (or whatever travel power you want)
- Select your new abilities as you level, then try them out in the "Powerhouse" before you get stuck with them (swap them out free withoutthe respec cost if you don't like them)
- No classes - take a power from any power set you like at almost any time or follow a theme - your choice

But along with the good there is some bad:
- Documentation - there is none - is this abiltiy good or bad for your build - total guess
- No software boxing
- Not much support for macros

Defintely worth a look for $50 in my humble opinion. Very different feel from WoW makes it a nice side-hobby.