I just had the opportunity to go through one of the 4 situational simulators in the country. I think the other 3 are restricted to military, government, and LE training. I have to say that it was quite amazing and really draws you into the scenarios. They use a beretta 92 and a glock in the simulation. You hear the bang through the speakers and the slides operate every time the trigger is pulled so it is fairly lifelike. The kick isn't as pronounced as a live fire but it is close.
You can move all throughout the simulator room and crouch or kneel and the computer still picks up the trigger pull. There are 150 different situational simulations that change according to your actions (whether you pull the trigger or not).
They have had to restrict use to only people with instructors present because the simulations are so lifelike that people become totally invested in the situation. They've had people go into total melt down due to past experiences. They had a psychologist come in last week to have a meeting with affiliated instructors on how to deal with the meltdowns if someone goes into distress during a simulation.
It's a pretty incredible system. I'm totally blown away by it and plan to make use of it with my students.