When reading the EA site you dont have to buy to try, just apply for a beta key and download the beta files.
As far as machines go my pc is more than likely down the scale now but still must match the "masses". For the game I have tried all settings from everything off to everything on, makes no difference, the problems are lag, epic lag, and nothing but the lag. I have found some servers in usa that run a bit better but still I find I am getting knifed or pistol killed by guys that I have shot whole clips in from point blank range. I bet over 50% of my deaths are by knife and pistol the rest by sniper fire. Maybe these are players pressing the famous "play now"
button and living in Siberia or Alice Springs. I dont know, the game has potential to be a lot of fun, a pretty good squad based game. What the game needs is,
1 Better server browser,
2 Get rid of friggin sniper class
3 remove grenade launcher from assualt rifles
4 pistols do too much damage, more than assualt rifles
Now my pc is a AMD 5200 with GT8800 512 ram O/C the window 7 rating gives me 5.5 out of 7.9. So not great but not crap either.
What marti says about snipers is true. Yesterday I was running down the death alley into town and I counted 7 snipers on the rocks alone LOL

While looking and laughing I died of a sniper round

So do I like the game? well in some strange way I do

the finished product has to be better I would imagine.
So today with the game running abit smoother, I would give it 6/10
Change my mind, game is crap and I would not give higher than 3/10