I have had Vaults on my bikes for about 6-7 years one set for the duration of that, I have changed the bushings once, zero studs replaced and only greased them when I changed the bushings.
The pedal feel is perfect for me , all others seem to have bulges or axles in the wrong place.
The burgtec seem to sit very close to the cranks on some bikes, not great for the ankles.