Yep, no particular fan of the nitrile combo valve design. Less concern about adbv portion of the combo, than the bypass portion. If one wouldn't prefer a nitrile adbv, why would one want something that also functions as the relief/bypass valve. If the adbv tends to function at less than optimum, worst one will get is some start up rattle, annoying but not really terminal. Bypass fails, who knows.
Find a NPS application that still uses separate adbv and bypass (pics of one posted here recently) ok, otherwise I'd pass and go for the Napa Gold or some other brand with separate adbv and bypass.