The main problems I had was with the throttle. I would increase it ever so slightly and nothing would happen. Then after half a minute or so, it would shoot up to a silly level and I'd just spin off into the countryside.
If I tried just raising it very slowly until the aircraft started moving, same thing happens.
In CloD I have real trouble getting the Hurricane to turn at all - and it's the only one I've tried so far. It was a real nightmare.
I'd like to do more, but it's so off-putting, it takes me so long just to get airborne, by the time I'm up I'm either in the completely wrong frame of mind because it's been so frustrating, or I don't have enough time left to fly the mission.
Also in CloD, I suppose it doesn't matter that much, but I like my screenshots - I have thousands of em from each sim I fly - and the aircraft looked silly from the outside view. I can't quite describe it - like a toy, I suppose. I think there is an option IIRC to have different exterior finishes, so maybe I need to look at that.