Hi there,
The trial period for [link=http://rcflightsim.com]ClearView[/link] is 40 minutes. When you set up the controller, the time does not run. The time left is shown at the top of the screen. Given the price of the sim (only $30) for 30 models and eight fields the trial time seems reasonable to me. No other sim provide more trial time and the RF G3 demo while not timed, is limited to the keyboard. Whenever a new ClearView version is released, you can download it and get another 10 minitest trial time to check out the version. ClearView RC Flight Simulator is under active development and improvement and typically, there are few new versions released per month, so you will have plenty of time to evaluate the simulator. As the author of the sim I can say (and that is my opinion only) that the models in CV fly as good as the models in any $200 sim (Which I have and test and compare to ClearView on daily basis). I hope your experience will confirm that.
Stefan
http://rcflightsim.com