Got one..not terrribly accurate...however once you find a consistent "technique" and verify with an accurate scale, then it will work OK.

Mine always weighs 3 pounds low..but if I don't draw completely with my back muscles, I'll get a couple pounds variance in addition.

I don't pay any attention to draw weight anymore..I crank the bow up and take measurements...then keep an eye on my measurements for any changes..and I adjust arrow spine to the poundage, not the other way around...