Shoulder rests pros and cons are hot debate...in the end go with what works for you, everyone's anatomy is different and damage can be done if you have the wrong set-up. (Some people seem to have no neck, so they don't have a gap to fill)
In the days of Baroque (with no chin or shoulder rests) the violin was held lower down and rested on the body, supported by the left hand, with chin off. This made it virtually impossible to shift down and a lot of the music was for first position mainly. For todays music you have to be abke to support the violin without the left hand (as Menuhin was demonstrating).
ASM has no shoulder rest but an incredibly high chin rest so the gap between shoulder and chin is filled.
Some male violinists play with no shoulder rest but they have sponge inside their jacket!!
QUOTE(sarah-flute @ Apr 7 2007, 06:01 PM)

I seem to recall that Maxim Vengerov was using a shoulder rest in that South Bank Show some time ago - didn't seem to slow him down much!
Ha! you can't post that and not expect me to come back with a little snippet
Maxim uses a Kun (and is always fiddling with it in the tuttis). He says he once went to play for Stern who was insistent that students play without the shoulder rest (although he was one of those guys with a sponge in his jacket and no neck!), he wrenched Maxim's shoulder rest off his violin and flung it across the room in disgust!
However when Maxim played his Baroque fiddle (RIP) he had no shoulder or chin rest.