I have a bad back, and this support has been a lifesaver. I have three guitars and the suction cups have had no damaging effect. I tried another brand once and the rubber reacted with the lacquer on one of my guitars. Don't use this on french polish unless you use a plastic shield (sold separately) under it. *SBM Note: The Gitano ships with an adhesive suction cup protector, which may not be suitable for some guitars.
*SBM Note: The Gitano ships with an adhesive suction cup protector, which may not be suitable for some guitars.