The instructions that come with the remote does not apply to every system this remote replaces. I bought this one to replace a remote for a Python 900 system. I used the instructions from my original alarm paperwork (per another review I had read) and had no issues. The only difference is what channel to program, the instructions that came with the remote say use channel 7, with the Python 900, the correct channel to program is channel 1. It programmed the first try and works great!
I got this to replace a remote on my Python 5305 remote start system. It did not come boxed, but appeared to be new. After I finally figured out how to pair it, it works great.