It doesn't have any real depth. It's the same old level up and grind dungeons for gear to do more dungeons. The dungeons aren't particularly hard as much as they are a gear check. If you pay money than the gear check is pretty easy to pass. Then once you finally have an awesome set of armor...they will release more levels or dungeons and repeat it all over again.

PvP is tacked on and implemented terribly and again it also supports the buy diamonds or don't play. Classes are horribly imbalanced and PvP at higher levels comes down to 10s or less most of the time.

The entire game is designed to keep you grinding/getting new gear and using cash shop to stat it up. Once you realize it the game becomes stale and boring.

If you don't buy diamonds? Well you'll have a lot less stats and have to spend A LOT of time, I'm talking 2nd job a lot, to even be remotely competitive and even then the fully cashshopped will still put you to shame.

If you're casual its a fine game to keep you busy. However, if your a serious MMO player than getting a P2P game will save you A LOT of money.