Alarm System, any comments on a Scorpio SR i900

[Gorluik]

Hi all, does any of you have experience on a Scorpio SR i900 alarm system, here's the specs:
Sensor violation display
Audible/vibrating alert
Dual-axis accelerometer for detecting impact/inclination
Built-in 120 dB multi-tone siren with soft chirp
Remote motorcycle finder/panic alarm
Ignition disable feature allows the user to remotely cut off the engine in case of hijack
Programmable perimeter sensor with warn away that detects motion around the bike, protecting saddlebags, luggage and accessories
Built-in battery backup system allows the pager to operate even if wires are cut or circumvented
This unique auto-arm and hands-free disarm operation provides the highest standard of security and convenience
RF-ID for hands-free operation
Range and signal status display
Compact design (3 11/16” x 2 3/4” x 7/8”)
Programmable auto or manual arming and disarming
Long-range FM transceiver (up to a 1/2 mile)

My questions are, this has a perimeter alarm which will detect the presence of someone near - do you get too many false alarms with this option? What is general feeling - good feature, or is it better just to have a montion sensor that detects if the bike position is moved? Is there a better alarm for the money (about $500 CDN). Your comments are appreciated.