Certainly it's a cheaper alternative than a full blown sim!! Colleagues in my previous working life have used it as you suggest. There is, however, the caveat that there are minor discrepancies between the (for instance) fuel system synoptics and the real thing - not major but such that you cannot say that the indication you see in PS1.3 is what you would see in the same circumstances in the aircraft. To balance the equation, I should perhaps point out that, I was sufficiently impressed to buy my own copy for home use.
