Most people i know have said the same thing, the factory units are not so bad, but aftermarket units for most have had many issues. I think some of this is due to the $8.00 a hour pimple face kid (A.K.A.) installer.. not knowing his stuff.
horror story: funny one too, My old neighbor had a viper remote starter installed in his new Ram truck.. just bragged and bragged.. then the troubles, another neighbor had something (not sure what) that whenever he activated it, it started the Ram as well.. obviously a problem.. so the truck went back to the store, NEW SETUP.. first nite it was home, the truck started itself multiple times-->on its own
i like the idea of a remote starter, but this story, and seeing all the troubles my old neighbor had turned me off
on the flip side buddy at work has a GM 2500 pickup with factory remote starter, it works A LONG WAYS AWAY.. and he loves it. had the truck a couple of years now and ive never heard him say a bad thing about it..