There are commercial air combat SIMULATORS that are "designed by real military pilots", but they don't convey what it's really like in an air/air engagement. Nonetheless, I do enjoy playing them against my nieces and nephews.
Instead of ignoring experienced crews who are saying not to completely accept what you're given, maybe you oughta consider their opinions
Personally, I believe they have a little value in teaching how the instruments reflect reality, and how they interact with each other and the aircraft.
However, they do NOT teach: Situational Awareness, "air sense", and the need to aviate,navigate and communicate simultaneously.
They certainly can teach one bad habits, that once ingrained will be difficult to unlearn. An example one responder gave to a similar question was, when he was learning to keep the aircraft level in a climb, he was watching the VSI rather than just looking out the window.
Bottom line enjoy the experience, but don't be under illusions that you are getting anything like "what it's like".