They work well.
I know the guy who built the test rig for a different manufacturers version.
There may have been some horseplay during the testing of the test rig ans numerous visitors may have bounced around the workshop floor - I couldn’t possibly say.
The tether must be tight in all planes of movement as you don’t know what direction will be if you ever need it.
Several companies produce them, check for coccyx and neck cover.
Its an extra layer, plus they can block the vents in your jacket so may be too hot in the summer/hot climates. I wear mine pretty much always for half the year but not always in summer.
Luckily the Burgman comes with plenty of air bag storage space under the seat
