I play it (Drix013). I've been playing it almost the entire beta. But the first Multiplayer FPS that grabbed me and got me involved in gaming was the original Tribes. So I am a big proponent of the series, and can say this one is very true to the series. More than that it's AWESOME.
For those unaware, it is a Free-to-play (best on market biz-model comparison is TF2), and all weaponry and non-cosmetic alterations can be bought with in game experience. And all equipment upgrades are in game experience only (as in cannot be straight bought).
Also, for those worried about their hardware, this s unreal 3 Engine, so if your comp was built in the last decade, and isn't a net-top, it can most likely run it.
There's no excuse not to enjoy this one.
BTW, 250 free tribes gold on facebook (
http://apps.facebook.com/freegoldtribes/contests/196147)... enough to unlock an extra weapon.