I have one of those alarms. My main problem with it is the dreadful noise it makes when you set it or cancel it.
Quite unnecessary, I think- a little chirp would be fine. It emits a full-blown scream each time. Most unsuitable for a quiet neigbourhood or outside a motel (where it's probably needed most) when an early start is planned.
Not sure which one you have, but my one gives a little chirp when setting on or off. I can imagine one such as yours would be inappropriate and ponderous.
Yep, pretty happy with it. You can set it to either immobiliser mode (the ST didn't have one, but HISS models have one built in anyway), or to alarm+immobiliser mode, which will kick in when it senses a change in tilt, ignition tampering or lifting the sidestand. The sensitivity can be changed as well, but I have it set to whatever default is and no false positives so far, even in big winds or with loud things going past that could cause resonance.
The disc lock alarm seems an interesting alternative. How does it work and what sets it off?