I was curious about this as well… I have played with a few. They are junk. I guy I work with bought 3 sizes. Everyone had a different quirk. you could tell the bearings are not of any quality. The smallest one is not as small as a 500 sized Shimano or Tica.
THe 1000 sized handle cranks very close to the bail, you will actually nock your knuckles on the bail spring.
I have a feeling these are in that category of No 8/eagle claw and other reels where you can gamble and try to Get a good one but most will be of poor quality.