You have to keep in mind, that every review you read is coming from a different person.
Different people have different expectations, and different ideas of what tolerances are acceptable.
An old saying comes to mind: One man's trash, is another man's treasure.
There's a reason many people consider the Lyman 55 and/or Redding BR powder measures to be some of the best "low end" powder measures available,; and there's a reason many people consider the Lee Auto-Disk and Perfect Powder Measure to be perfectly adequate: They have different expectations, and use the devices for different purposes.
There is no "one size fits all".
"Such is the strange way that man works -- first he virtually destroys a species and then does everything in his power to restore it."