I purchased a Trek Transponder SM100 to protect my small yacht at a river mooring after experiencing a vandalism attack. I installed the Trek myself, which was daunting to me as I am a non-electrician, but I simplified the task by testing the system on a bench, and then installing it in a basic configuration, and then expanding it.
A big advantage to installing it myself is I am now comfortable to alter and expand the system in future. Adding components is quite straightforward. Since Tony designed the Trek he had excellent answers to all my questions.
So far the Trek is working very well for me. It is surprisingly fun being able to remotely obtain photos and data about my boat whenever I wish. That is an unexpected bonus, in addition to the primary purpose of the system which is monitoring, notifying me and enabling some remote assessment in the event of a problem.