I hadn't played this game for quite a while, but recently I did a major PC upgrade and reinstalled it. I had forgotten what a fun little game this is. It really sucks that the multiplayer is degraded, but it is still fun.
If you are looking for a high fidelity sim then look elsewhere. This is not a study sim like Falcon 4, DCS A-10C, or the IL-2 Series. It is a bit arcadey but the physics are fairly responsive and realistic and the visuals are outstanding. Campaign missions flow in their own way, and you get to experience several different sides to WW2 flying. With the addition of the Luftaffe DLC it seems to provide a reasonable all round experience.
Combat is a bit arcadey with fairly predictable AI and an overwhelming urge to be the lone saviour of every battle. It is, however, easy to task wingmen to perform essential roles thus relieving you of the burden of the missio0n so you can go round shooting everything that flies :-).
As for controls, being a bit of a flight sim nutter, I used one of my simple joysticks with no issues. I cannot comment on any other control method as I have not tried them and don't really intend to. Joystick was simple to set up and allowed me to use almost every function from the stick without having to resort ot the keyboard very often at all.
All in all this is an enjoyable semi-sim. I would recommend it if you want an easy to get into light sim. For a flight sim nut...probably not unless you are looking for an entertaining session of blowing s**t up.