Mkay, so on PC, my experience was awesome peppered by lag. My WiFi card is less than adequate at the moment so I'm sure that didn't help. I max the game out easily on ultra with everything turned on at 1080, but the lag is the killer. As stated above, it's to be expected and can be worked around. Battlelog is the worst piece of software ever developed, but I've been chiming that tune forever. The game itself, is brilliant. In the moments between the lagspikes it really is well sorted. The TTK seems significantly lower than BF3, the medkits are smaller, but I found camping to be a major issue. Obviously camping is the easiest tactic hence why it's in the game at the moment, but once people start catching on to it I'm pretty sure that campers will be in many a sniper's scopes. Most obvious is the top of buildings. I went up tons of elevators only to be greeted by some twat sitting on the rooftop prone, with his sights on the lift. I have no doubt that there is a sniper spot somewhere which is yet to be found, and if not, that DICE will implement one, as the campers sitting there are frankly ridiculous. I came out a lift at one point to be greeted by no less than four of them.
I haven't ventured into vehicles yet, I drove an APC for a bit but the lag spikes meant I crashed quite a bit. The handling seemed alright but it needs work. This is most likely a lag issue.
So far, I give it a 7/10. My feel towards the game is that it has the potential to be a solid 10, but at the moment it's let down by simple flaws and what can only be described as "bitches" - people who camp.
If DICE manage to sort out the connection issues and give us a way to combat campers, this game ought to be awesome. I can't comment too much on vehicles yet so this score is based on direct combat.
I have high hopes for this game.