It wasn’t the scale of response that sold me (about which I agree), it was the apparently quicker, seemingly instantaneous reaction of the valve to WOT. In addition, there was at least one fairly well-done video showing a slightly faster 0-60 time with it. Anyway, I got it on sale (~$200) and wanted to finally test it. As described, I’m not terribly impressed with it on my ZHP.
2004 BMW 330i ZHP (52k miles), Jet Black with black leather, MFactory LSD (3.38) with Z4 cover, 18"x8.5" ET38 APEX Arc-8's (Anthracite) with 245/40 Michelin PSS', Koni Sports with factory springs and front and rear reinforcement plates, Shark Injector, Corsa TSE3 cat-back exhaust, TMS under-driven pulleys (water & steering), CDV delete, TMS CF strut brace, K&N CAI, GAS DISA rebuild, TMS pedals, Wheelskins steering wheel cover, roller tray center console, black-out grilles, and WeatherTech mats