Remote Start w/goodies

I am getting a remote start with smartphone link. The dealer wants 550.00 for the factory and the Alink is over 600.00 for five years. The aftermarket is about the same but the yearly is 80.00 I hear the aftermarket has more features. The factory remote start has a flaw. When you remote start the car it turns off once you enter the vehicle. I would think that's for security. The idatalink says nothing about that. I'm having the idatalink installed in October and I'll let you guys know how it is. My last car had an audiovox prestige with cell link. The cell link was a one time fee of 125.00 and worked perfect.