I used to have a fusion car alarm, had everything i needed until i wanted boot sensor, and the fusion sensor for the boot just wasnt worth it... but other than that, it was perfectly fine. even worked when someone tried to steal both my wheels once, and my car another time lol.
now ive changed to a different brand, and quiet frankly, it was more expensive, but doing exactly what the fusion one did. obviously i dont have any fancy features like remote start (which i believe is stupid anyway) etc..
and my black widow central locking motors rods etc etc are still working fine to this day! never had a problem with them.
edit: RHINO alarms are a pain too, they work extremely good, but replacement remotes are basically more expensive than an alarm itself, and their buttons seem to always mess up too..