It's different than a lot of MMO's in the fact that it is NOT "click -> walk there -> watch your character hit something". There's actual skill involved. You can pull off combos and dodge attacks. You go through different dungeons with up to 4 other players beating each stage on your way to a boss (sometimes 2). You can tell they actually put a bit of thought into the gameplay. Here's a couple of pictures:


The animations and effects are great. It runs on the source engine, but it still looks pretty damn good. The character customization is kinda crap, ill admit (theres only 3 character types available right now, 2 more on the way), but it kinda makes up for it by making the armor customizable. Armor gets a random colour set when you craft it and you can dye it (i think this requires actual money, don't quote me though).
Equipment also affects gameplay. For example, the character Evie can use either a staff or a scythe. The staff allows you to fight using spells, while the scythe fits her more for getting up close and personal with melee. Both weapons have their own abilities unique to them.
Seriously, try this game out. What do you have to lose? It's bloody FREE. And good. Just keep in mind it's an open beta, therefore not entirely complete. 2 of the playable characters aren't released yet and there still releasing more "episodes".
You can even add me if you want. I'm on the east server under the name MovinTarget9. Just warn me if you do. I don't accept random friend requests.
http://vindictus.nexon.net/