50% of the people that I know with remote starters in their vehicles have electrical issues due the the installation or incompatability of the unit. I am even aware of a very reputable shop in town(huge place! advervise on TV and local papers) that won't install them on certain vehicles due to incompatabilities with many of the units they sell(top end units too!) Man, I've heard horror stories! I could go on and on.
Our Lexus dealer told us that they do not recomend installing a unit in my wife 01 Lexus RX-300. I have a buddy that had a unit installed in his Chrysler 300 and taken out and put in his Toyota Highlander(same as the RX) and has only good things to say...I called 2 other Lexus dealerships in the NY State and was told the same thing. I asked other Lexus dealers in other states while on family vacation and was told the same. They don't or didn't recomend having a unit installed due to the complexity of the installation, the bypass of the factory ignition system, the poor quality of the units being sold, the 40 + splices needed to install the units and other reasons. Most people say it's fine if you don't get a butcher installing the unit, but...
My FIL wanted a unit installed in his Mini-Van and I told him what I have heard. He went ahead and had a unit insatlled anyway(at a reputable shop) only to have it removed 3/4 day later due to, well, it just didn't work and his head lights and dash lights were doing strange things(he said).
An aquaintance of mine(who has an Altima like mine) was just recently(before Christmas 09) refused at a reputable local installation shop. Saying that Nissan doesn't recomend having aftermarket remote starters installed in their vehicles. I don't know!
Now, I know others with the same vehicles as ours, having great succuss and love their remote starters. And I do know many many people that have units in their vehilces. It's just about 50%/50%. NO LIE!