I will certainly say the game is good fun, IF, you play with people. Good thing is that the group finding tool has pretty much worked flawlessly so far. Takes under 30secs so far to find someone or a full group.
However, there are some bad points. The game lacks in control. While you do have 25 heroes to pick from, that generally play in a unique fashion from one to the next, you have little control over them besides equips. No stats to apply, no level-ups, no skills to invest. Skills are set, but there are slots open for shared skills.
Customizing the look of ones heroes is great. In other games everyone ends up looking the same (generally). Here you can easily make them standout somewhat.
I am reviewing this game for MyGaming, so expect a review either Friday, or next week Monday for more depth and a overall score. I still need to check out PvP proper.