Scorpio SR-i500SE Two-way motorcycle alarm

[PMac]

Hey guys, thinkin about pickin one of these systems up off ebay for my F. Anyone have one of these systems on their bikes? Worth the cost? And I read that they're install-yourself. Is this true? And if so, any troubles or problems when installing? Also looking at the Gorilla systems. Any insight to which is better? I mean the Scorpio are pricier, but any huge difference? Thanks.

[FearedGS500]

well i'v been waitin on a email from a member here . they built there own alarm with tilt sensor's in it . and was suppose to be cheap .... its  DIY kinda of thing ..but no luck yet  so if anyone has his blue print, or lay out ,write up   thinkyou can pm it to me