I got game yeasterday and after several hours of practise can now even shoot enemy planes down now and then (Full realism ofcourse). Now to good and bad points.
Positive:
flight model is very good
damage models are good.
AI uses plane strenghts (IE dont try to dogfight with spad against Fokker)
Very pretty
Weather effects are superb.
Mission editor is very powerfull (In time there probaply will be lots of user made missions)
Negative:
Campaing (not historical and there are not any information of your squadron, etc. You feel like you just do single player mission in a row).
AI collides constantly (with you and each other).
Too few modelled planes (I dont mean flyable, overall there are way too few plane types)
Recon/bomber gunners are snipers. I fear them most
In a way game in current state feels like flight simulator series where you just can fly and look amazing landscape (I actually did fly to Arras to check cathedral there. It was modelled

) with very good flight model. IMHO campaing is most disapointing aspect. I have already downloaded one user made mission and it actually was best mission that I have so far flied in game, so you can expect lot from there.
Overall I enjoy in this game as I had readed all bad things before and nothing game for surpise. This game actually suprassed my expectations.