Go to the thread indicated. It's a very long one.
The Jimma seems to be about the cheapest
chipper that will do bigger than 3" pieces in the approximately $1500 price range. About the only chippers anywhere near this price are the DR
chipper and the MacKissic. The MacKissic is a
chipper/shredder at around $1400-1700 depending on whether you buy it locally from a dealer or from Northern Tool (a friend of mine recently got his TPH-122 from Northern and has to put parts of it together, like you apparently have to do with the Jinma). If you want a
chipper/shredder from DR, you'll have to pay up around $2500, I've heard. The guy who bought my Gravely MacKissic has one of the DR
chipper-only rigs and likes it. I've had various DR equipment. They make pretty good stuff. Bought my MacKissic because the local JD dealer offered them, and I kinda liked the one I had on my Gravely.
On that thread indicated for the Jinma, you can read about folks expressing opinions about buying Chinese, American, etc., too. It's a LOOOOONG thread.
Ralph