The Fm-2 is one of the funnest planes to fly. Many see it and think it's an easy kill. My best single sortie in one was 12 but anyone with a sense of the game can get 4.
It's slightly slow to climb, once level it picks up speed nicely, in a dive it gains speed quickly and holds on to it. The wep is very affective as is the 4 50's it carries. Set the convergence properly and you will make easy kills (275 and 300 are nice when they criss cross) Don't be afraid to take a few bullets either, it's one of the toughest planes in the set.
The best part of the plane is it's turning capability, it's the American zeke without the compression. The view from the cockpit is above average and the controls are very smooth.
This is an old convergence I used. Slightly shorten then what I wrote.