My ES175 is from the run Gibson did in 2015 - the Memphis Historic ‘59. It was supplied with an all rosewood bridge, which was fine with wound G string flatwound 11s, but wouldn’t intone when A swapped to a set with a plain G string.
I preferred the plain G for blues, so I bought this bridge to get the intonation right. It did the job… but more than that, the guitar simply sounded better. On the old bridge, the low E string could inexplicably set up a weird resonance against some chords. The ABM has no such problems, and the guitar has retained all it’s tonal quality and gained a bit more “attack”. So it’s more versatile - and sounds even better now I’ve switched back to flatwounds.
I think the price is fair for the quality, tone and functionality.