The game isn't near as bad as some people make it out to be but that said it's not really that good either.
What I liked:
Planes generally looked good.
Missiles are not guaranteed to hit and can be out maneuvered, some missiles are harder to evade than others.
Large flight area.
Lots of things to kill.
Controls were fairly responsive once I had them set up (used Logitech Extreme 3d Pro joystick).
Flight was good and felt smooth.
Plenty of planes.
AI breaks off if you come right at them gun blazing.
What I didn't like:
Endless stream of enemy fighters. They just keep taking off from any nearby airfield and they don't stop even if you put a 1000lbs bomb on the spawn because you cant destroy hangars outside of missions. Could have been fixed by limiting the number of planes that can spawn as filler enemies and allowing us to destroy the hangars.
SAMs SAMs EVERYWHERE! Just ridiculous amounts of SAMs.
The game basically tries to spam you to death.
No cockpit view.
Gun lead indicator is terrible. Almost never accurate in my experience.
"Squadron leader Razor"... where's the rest of my freakin squadron then?
No friendly AIs in most things and the ones that are there in the later missions are basically useless meatshields.
No friendly ground assets. There's nothing going on on the ground aside from loads of enemy SAMs and the occasional helpless mission related friendly you have to babysit. Occasionally you may see a blue SAM indicator but sadly they never fired a single missile even when I pulled the enemy right over them.
Missions are just the same couple sets of things over and over again in different sections of the map with more enemy planes and SAMs each time.
Enemy SAMs can detect you skimming the treeline on the otherside of a mountain from them. Sure they'd probably hear the engines but there's no way they'd have you locked when there's a mountain directly between you and them.
Some of the corniest dialogue I've heard in ages, and not in a funny way.
The way I look at this is the same way I look at Ace Combat Assault Horizon, like an arcade title. This is one of those games you rent on console to beat instead of buying it and beating it once or twice then forgetting you own it. Only exception is when buying it costs the same as renting it. It is fun enough to at least rent so either rent it on PS3 or 360 or keep an eye out for a sale.
If you're looking for something to sctratch the itch left by Jane's titles like Fighters Anthology or one of the other great Jane's titles from the past this is NOT it.