I have played the Tribes games over the years, tribes aerial assault was one of my favs
Its a good game "Ascend" if you have no previous tribes experience and are open to its learning curve. Its gameplay mechanics can be very deathmatch style gameplay with the unique movement of drifting and sliding with the jet packs, as well as vehicles which I feel don't play a huge roll in game often.
However I turned away from it due to its different approach then previous tribes games. It may be different now considering I experienced it during beta.
I'm all Planetside 2 now when it comes to my futuristic games