It should be. Stalls are such a basic and critical aspect of flight (especially for aerobatics and high-alpha dogfights, as most dogfights are in simulators) that if you get that wrong, your entire flight model is a pile of crap. A flight simulator that doesn't get the stalls right is like an infantry simulator that doesn't get the ballistics right.
And yet, an infantry simulator that doesn't exactly and precisely calculate the effects of gravity or wind on a given projectile fired over a given distance at the precise ft/sec rate can STILL BE FUN.
An old boss of mine was a Navy fighter pilot in Viet Nam. Me and a friend used to play games like Secret Weapons of the Luftwaffe, Battle of Britain, F19, F-117 and Chuck Yeager's Air Combat (among others) on our work PC's during lunch (we even brought in our own joysticks). Our boss, the pilot, would occasionally come and play too. He enjoyed the games and never once complained about how the games didn't accurately model accelerated stalls. He simply thought they were fun.
My advice, unsolicited though it may be, is to save your $30. Doesn't sound like there's any chance at all that you'd enjoy this game.