The desk/bench i use for hobbies is one from Ikea... solid beech top with 4 metal legs. I knew a vacuum vise wasn't gunna work, so i bought the clamp style.

Up till now, i have been using the rubber vise guards that came with it, thinking it would grip locks better and not damage them. IMHO a BIG mistake. I used the vise yesterday for something other than picking and didn't put the guards back on again, then went back to picking. I almost jumped when i set the first pin. It was like the difference between snapping your fingers and a Gunshot!!!
Basically every audial piece of feedback was deadened before by the rubber guards... Now every sound/vibration is transferred first to the vise and then to the bench top AND amplified. The only way it could be better is if the the bench top was cheap blockboard or even an old hollow door to act as a resonance chamber.
It now seems so obvious now, thought id share
