I had to retire my old M$ FF1 stick as part of the latest PC upgrade, and just took delivery of a Logitech G940 FF system - not a cheap piece of kit, but I'm impressed so far - really good force feedback, and good solid bases. The rudder pedals are a new feature for me, and work well, especially the toe brakes, which don't work on the Spitfire (well they wouldn't would they, as it didn't have them

They do work fine on the 109 though

).
I was using an X45 until this arrived, and it's in a different league altogether.
Adds enormously to the game immersion, and is absolutely, definitely, positively worth the investment
Another week and I'll have all the features understood and programmed
A couple of game-related FF comments:
The stall warning is excellent (my main reason for having it!) and the FF effects generally very good.
The machine gun effect is rather good, but the shake continues after the ammo runs out.
The shake when the engine cooks is quite frankly just unnecessary and shatters the immersive quality of the game IMHO - it reminds me of the old CFS stick shake when taxying - did those ailerons really drag along the ground
I waited ages for a decent FF stick to come on the market, and although I haven't tried anything else, I'm glad this came along when it did - it's nigh on perfect.