Overall, I recommend it. It's a fun strategy game that can be played either in short bursts on over a long period of time(1+ Hours). In many ways it improves upon the original Ace Patrol, such as more modern planes, new maneuvers, better plane customization, and more detailed maps. But in they totally ruined the feeling of choice the first Ace Patrol had, where you can choose what types of missions you wanted to do, where you did the mission types you liked and avoided the ones you didn't, except for when you were desperate for points to win that Defense/Offense and that mission type you didn't like had bonus points that period.
In both Ace Patrols a campaign consists of alternating between offense and defense, with each offense/defense having 5 battles. Each battle you got to pick between 1-3(1 being the final battle) different mission types. So the whole offense/defense you got to choose your favorites.
In Pacific Skies(this game), It's still a Campaign with 5 alternating Offenses/Defenses and 5 Battles each, but now you can pick your mission type. It just randomly picks one, which BLOWS.
Being able to pick my favorites, or picking my disliked types when I wanted variety was my favorite part. Since enemy Squadrons would rotate pilots between battles, so if the current battle had pilots you didn't like, you can choose a more defensive mission type. But that's gone in this game.
And for some ungodly reason, they removed the full screen option. It was more convenience than anything else, but I see no good reason to remove it since Pacific Skies is basically a retexture of the first game.
Anyway, as a final comment: Unless you hate the planes in the first game or love the planes in this game, just get the fist Ace Patrol, it's better. Though this game is still good too, I guess.