the best product costs the most. The mopar unit parts alone is near 300 bucks based on how good of a discount you can find. Its the best unit and easiest to install. Were you to install this yourself you'd easily spend an extra hour and a half with aftermarket ones
when I first got my car back in 06'. I had Best Buy put in the viper w/remote start. They never could get it to work right even after 3 consecutive weekends in their shop. So needless to say, I down graded to just viper alarm.
2 months later, I put the mopar remote start in myself in the parking lot at work during my lunch break. Worked perfectly. Now I have a viper alarm I never use unless I see the need for it because the remote start with set off the viper alarm and thats not fun to deal with.
So, I say don't buy an aftermarket one and get factory.