I have it. It really isn't at all deep.
N.O.V.A 2 is better online and actually has an offline. Archetype's not bad if you literally just want to shoot people but that's about it. The weapons are decently good, but there are only 5. Ranking system is not that good and the lobby has a lot of glitches.
It's very addictive though, and for $0.99 i doubt you could find a better fps for that!