Realism of any flighsim dynamics is an endless topic. NOTHING flyes as good as a real aircraft except the real aircraft.

In our MiG-21 we've modeled all of the most significant and important Mig-21 characteristics. I.e. take-off, approach, landing, service celling, speeds etc.
When you fly it you sense the highspeed, powerfull cold war era aircraft.
It won't take of at 140KIAS, it won't allow you to approach at less than 160KIAS.

The model isn't ideal but it's definitely close to the prototype and fun to fly.