I have found the Oxford Boss disclock with alarm is over sensitive.
I fitted to the bike in the garage and got defended as soon as I locked it! Luckily both bikes have alarms so they are just being used as disc locks.
The Triumph has the standard alarm but the MV has a CAT1 alarm which cost me just shy of £400 fitted. Piece of mind is key with that bike and would be devastated if it got knicked as it is rare.