This game is great, but could've been better if it weren't for the terrible lagging of online play.
Cons: Most of the times the online play is laggy which renders it unplayable for some servers. Also the security and the environment of this game is terrible.
I'll list the cons first. Online play is great when you play it without lag, but it's terrible when you have high ping, low FPS, and even if the internet connection is flinched. So some servers are unplayable. Also even if you get a server with good connection, the environment feels unfriendly. People calling names to each other, stealing vehicles when they're not your enemy, killing each other, and like that when they're all waiting for a plane, huddled up.
But there are more pros then cons, fortunately. The AI still leaves much to be desired, but they're smart enough so you could find it enjoyable. The campaign also is pretty fun. Also, the patches were very much improving the game over another, which makes is quite stable.
Two more expansions were released, and they take it farther, although I'm not going to take the trouble of writing all of them.
Some servers, unlike others, could be friendly and communicate and help each other. It's like you're in Midway and you're controlling a destroyer near the Airfield. Then a scout on the other side warns by radio to see that a submarine is coming toward the Prince of Wales. So that allows me to completely understand every part of the game, and go when it is necessary.
Overall I think Battlefield 1942 is a good, solid game which could be enjoyed my many players.