I just bought the Tru-Flite stimulator and so far had tried out on the heli portion. The flying is very realistic. Only have a few points which I don't like.
1. No detail instructions how to set the gyro rate. (which I'm still having problem now)
2. The heli's are very detail but the scenery option is too few and they look almost all the same.
3. The heli/plane models are all base on actual R/C models but the option given is limited. Also, there do not seem to have any free model available over the internet for users to download.

Other than these 3 points above, overall I still feel this is a good stimulator. It flys like real, easily to setup and get going (except the gyro).