I'll put up a word of caution to after-market or non-oem remote start installs. These tie in to your factory electronics, which can void a lot of your warranty. It doesn't guarantee that theyll void it, but if push comes to shove and it gives them a reason not to pay for any repair, well, your out of luck. Stick to OEM parts and you have a much better chance of winning that fight.
In addition, if you are thinking of getting the OEM remote start, the installation is trivial at best. The unit comes with pictures, instructions, and everything is plug and play with absolutely no wire cutting or splicing. Just locate the plugs, unplug, plug the new ones in and enjoy a warm car on a cold winter morning. If anyone has difficulty, feel free to pm me with any questions, i'm happy to help.