What do you guys think of the Aerodesign Prop calculator?

Gyles AeroDesign Propeller Calculator

It does seem to take pitch into account and also adjusts for airspeed. I've used it and its results seem a bit more realistic compared to what I see at the field.

Note: If you install it, look in the install dir and see the "extendedpropselector.exe" file. This one gives more detail including efficiency, tip mach number, thrust coefficient, power absorbed etc.