Clifford Matrix 10.5X

Hi everyone,

I've been looking into alarm systems for a while, and I just found a Clifford authorized dealer near my place. I called them and they have the Clifford Matrix 2.5X and 10.5X in stock for $350 and $400 installed respectively. Apparently the only difference between the two is that you can control the shock sensor with the remote on the 10.5X. Both come with shock sensor, ignition kill, keyless entry and all. Tilt, glass and proximity sensors can be added for $50 a piece.
Now here are the questions !!!!
1 - Does anybody have that system or know where I can find reviews about it?

2 - I am thinking of adding the tilt and glass sensors. Anything else (not listed here) you guys think I should include?

3 - What do you guys think of the price quote?

With that, I'll get back to work and bid you mates good day!