I rate the actual unit at 5 stars but only gave a 3 star review because as good as the instructions are, it's really vague about installing the unit.

The instructions only give you recommendations on where to mount the alarm but it makes no mention of how to position the alarm when mounting it

The alarm has different features such as being able to disable the shock sensor and other things which are easy to operate, and in which the instructions actually do quite well in explaining how to change functions and modes.

I rate the actual unit at 5 stars but only gave a 3 star review because as good as the instructions are, it's really vague about installing the unit.

VERY good instructions