I have a T901 and a B901, both more than a dozen years old. No lacquer flaking on either sax, no acid bleed on the tenor, a little acid bleed on the bari's loop brace. My A880, which is a very early one (pushing 30 years old?) has no acid bleed or flaking, but the lacquer is wearing thin in places. I've had no negative experiences with Yanagisawa.