2.1 on PTU right now seems like a very good build. Getting good FPS and haven't crashed yet, plus they made some improvements to the FPS mechanics.
Already, there's no other game that gives similar gameplay experiences. On one life I flew out to a security station, left my ship floating, EVA'd in there as a player was patrolling around the station with his ship, got an assault rifle, killed another player inside, EVA'd back to my ship, quantum traveled to a few locations, then went back to the starting port with my slung assault rifle, found a Freelancer with two people who accepted me as part of their crew... the pilot flew us back to the security station and me and the other guy EVA'd down 20 meters to the station from the rear exit, killing a player that was waiting down there with an assault rifle...
The whole thing is already so great, quantum traveling in a multicrew ship with other, real players, and being able to exit your seat and then do seamless FPS, 10/10. Delivering exactly the kind of gameplay that I was cautiously hoping for.