FMS is great for practicing basic stick maneuvers, take-offs, landings, etc...however, a lot of it depends on the design of the plane you are flying. I have a SIG Kadet LT-40 and have downloaded the plane into my FMS. It is similar to my real plane, however, it does not glide as much as my real trainer. Since individuals design their own planes, a lot of it will depend on the designer.

Where I find FMS invaluable is when I can't get hooked up with my instructor (still on the buddy box) or when the weather does not cooperate. I can still fly and get "virtual stick time" and practice landings and take-offs. I don't think any of the sims will be all that realistic, but for what you pay, i think FMS is a GREAT program!