Well, compared to Crimson skies is Wow a lot faster to play, and somewhat simpler. You use cards to move instead of hexagons and move over a game mat (or a piece of green carpet or some kind of aerial picture.
The game have several good things:
1. The setting. WW1 is perfect for aerial combat, it is from a time when people sometimes spent extra work to make the plane look cool both when constructing it and painting the thing. Legendary pilots like the Red baron, Bishop and Nungesser were treated like rockstars today, some people call them for the last knights (well, that is more or less a pr stunt). Anyways, WW1 is the ultimate setting for a dogfight game.
2. The models. The models are perfect for gaming, beautifully painted with a smart stand for altitudes. They can also be used to play other WW1 games if you want some change at times, Blue max is free and a perfect game to alternate with. The scale is very common so you can also buy planes from other places and add them with the official planes as long as you but the cards for the plane or use a similar. The blue max links suggest a fee sites that sells other planes, Reviresco is the best of them.
3. Fast and easy. You can play a game in 2 hours or so with a few friends, it is easy to learn and don't demand a lot of work to set up (like Battle lore or something). You don't need to print out stuff either like in Crimson skies.
4. Fun. Nothing is more fun than to duel with your friends (and enemies). The winner needs a combination of luck and skills.
Well that is probably the 4 biggest points of the game.
The weakest thing is that there isn't any campaign rules or skills in the official games, everyone is equally good (but the planes differs a lot). There is several player made rules for that which you can find on this forum (my one ones are linked in a thread here). That the game is fast and simple is another thing not everyone likes with it, if you want advanced rules with hit locations you might want to look on another game (but you can still use the miniatures).
My players started out with only my stuff too but now most people own at least one model, some many.
It is a fun game anyways