I played a bit, certainly has the same feel as the good old Tribes. Had a lot of fun. Will probably end up playing when it launches officially and when I have less single player games to complete.
Like the Tribes beta on facebook and they will give you a key. There are several of us with extras, as well.
In Open Beta now... having lots of fun! https://account.hirezstudios.com/tribesascend/ lemme know if anyone wants to shoot it up sometime