This powder is extremely similar performance to Power Pistol except with about ~.5 grains less or so...to give similar velocity and pressure. Generally. We see no reason to use Power Pistol at all, when this exists.
As far as flake powders go, our favorite before this was IMR 4756, but that is discontinued. So now, BE-86 takes the crown for what we think is the best flake powder for 9 MM. It can do near 1800 FPS in 65 grain Lehigh loads, and has good performance in the comparable ballpark to anything for all weights up to 147. It has a good degree of versatility.
We noticed after shooting, the cases are slightly warmer than many other powders here, with the exception of Titegroup, which also heats up your gun/cases. This really doesn't matter, but we noticed it.
You want what we think is the best flake powder on the market? We think it is probably BE-86, give it a try.