I didn't like the beta, as I just had a really bad experience with dieing to idiots. This has changed since launch.
I have been playing since about 2 hours after launch and have been really getting into the game. For starters the size of the battles are epic. Guys all over the place, bullets wizing around, this is real warfare that you usually only find in Arma 2.
The graphics still look a bit off to me, blurry like its some forced FSAA or upscaleing but performance wise the game runs well and it does have its visual moments. I have everything on high except for the motion sickness blur and the pointless SSOA.
I am playing on a US WEST server and havn't had too much trouble with lag. Usually issue with the medic gun being stuck on someone is only when I find out I am lagging.
Its a bit sad that gameplay seems to only take place around bases and you don't encounter anything between unless its flying. Most people spawn in from the moblie spawn points but the battles around the base are a lot of fun.
The game is on steam but personally I have downloaded it directly off the Planetside 2 site.
I can't really comment on the free to play part of the game yet but the membership benefits do look worth while and it looks like you loose nothing but the cert boost if you stop subscribing. I'll see how I go after a few more days to really get a feel of the game.
You can download the client here:
It is around 6gb in size.