Regarding the Perfect Powder Measure: It won't give you repeatable results right out of the box, it has to be used awhile first. I think it has to do with getting a proper coating of graphite on the moving parts or something like that.
I've probably got twenty pounds of powder through mine and if I want to just run off a bunch of blasting ammo I won't even check the weights, knowing that they're all within +/- 0.2 grains. When I'm loading for target ammo I weigh every load anyhow, letting the measure drop a slightly light load then "dribbling" it up to what I want.
Frankly, I think I could get the same results out of any other measure but I'd have to pay more to do it. The Lee is about $30 from the factory. Sinclair will be glad to sell you a Harrell for between $173 and $234, depending on the model. I can buy a lot of powder, primers and bullets for that kind of money.