ES Designs

We just order a 2012 3 i Grand Touring for my wife. She really wants remote engine start. Our mazda dealer priced the OEM remote start right around $500 installed. A local auto electronics dealer quoted me at $299 for an aftermarket system installed. $200 seems like quite a premium to pay for the OEM system, although if money were not an issue I would probably opt to keep everything OEM. I am looking for pros and cons, and experiences from 3 owners who have remote start systems (OEM or aftermarket). Thanks for any info or suggestions.