IMHO Pasquel the limb savers does help reduce the vibration and dampens the noise. As for them being limb savers--I doubt if some 'dry fires' their bow, the SVL Limb savers will come out a 'Hero'.
With this said, under the normal operation of your bow, the limb savers will certainly enhance the areas where the vibrations are occuring. They do work well for these reasons.