1. As one user stated, some maps are too small for fast moving aircraft.

2. The game alot of times runs slow, even on a good system.

3. There are only 8 new levels. Four or five of them aren't that cool.

4. The super heavy tank with the AA gun is too slow.

5. The intro shows the tank with the missles shooting them at very fast speeds. The actual shooting speed in the real game is about 1/4 as fast as it shows them traveling in the intro.

Overall though, this a very fun game. The jetpack lets you jump onto tall buildings, and shoot down on people. I love it! For $20.00, this is a very fun and great game. Just make sure you have a good system when you buy it. The best levels buy the way are Hellendoorn and The Gothic Line. The worst level is Kbely Airfield, and it is terribly boring.

By the way, did you notice the new blood effects when you are shot or when you are shooting the enemy soldiers. Check it out!

"Not so much..."
EA recently dropped the price of this expansion, but I don't feel it's worth the $20 price tag. It's not even worth half that amount.
There is no expansion to the one-player campaign mode, there are only added maps containing the new vehicles, weapons, etc. The new technology is not even playable on the original BF 1942 maps. And here's the thing about the new maps: they're lame. If you check on available game servers, you'll see mostly original BF 1942 and Desert Combat maps. Secret Weapons maps are rare. This is because, as already stated, the maps are lame. Yes, the new technology is cool at first, but what's the point when they are only there for multiplayer and there are no players using this game.
I'd say pass on this expansion, there's nothing worth buying here.

"Just adding to the fun!"
Secret Weapons is the second expansion pack in this popular series. I believe this one is better than "The Road To Rome". You have more new maps, more weapons and more vehicles. There are 8 or 9 new maps you can play on instant battle or on-line, though it seems 2 or 3 of the new maps are quite laggy when your not playing on-line. But the new maps are very cool are harder to beat than the original maps. and some of these maps have an awesome feel to them. A couple of maps take place at night, and when you are coming up on the battle from a distance and see mortar shells lighting up the night sky and here the Stealth Bomber but can't see it until it passes by a moon lit cloud, it is absolutely awesome.There are only a of things I don't like. One, you can hardly ever find these new maps in an on-line game. Two, some of the new vehicles (like one of the new allie tanks), you drive and have turret to fire from, but the other guy rides in the top of the tank gets unleash a barrage of missiles and only he gets the credit for it. Three, I still don't like when your reinforcement ticket counts down because you don't have half of the flags covered. I can see it counting down if you own all except the main flag, but not for half. Other than that, this game offers more to this fun game. And with the release of new patches (it has become easier to download them finally), they give you new maps. The most recent new map, Attack of The Phillipines, is very cool. There are at least 4 new maps I have seen, so hopefuly they keep releasing new ones (though you can only play these on-line), So buy this and enjoy.