Game is great overall, nice map with great exploration and things to find and do. Upgrading and improving your character offers lots of options. PvE modes are good and varied.
PVP is not fun at all, very laggy and totally unbalanced. Strong players will kill you before you even see them while your gun does as much damage to them as a water pistol.
The worst thing about the game though is how long it takes to find a match in any mode. Nearly everything requires a team to start and there is no cross server matchmaking and too many servers so you can be waiting for a LONG time (this might be different when game is released Global)