The berst sail plane / glider simulator on the marketm but... only for real pilots.
The reality is quite high, if you never piloted a sail plane before you will have big troubles to take off.
The graphics are pretty good, the expansions of the Alps (as Alpi 2.02 by Alex BLU56) are more realistic; the thermal system and the whole physics are great, absolutely close to what really happens in the air.
A plus is the possibility to play online with oter pilots: excellent experience.
I suggest an old MS Sidewinder Force Feedback 2 joystick and Saitek pedals: this way the simulation will be even closer to RL.
A must for all those guys who love flying in the real life... even if - piloting by real - is al another thing!
I suggest this simulation as it's the best ever made.