No experience with the ez-screen 800, but I own a 2017ish ez-screen 600 and it does a great job. I feed mine with a JD310 backhoe and you can't really overload it where it'll stop, what happens if you put too much on is you just lose some product on the oversize side. They're well built, you can call and get any parts that you can't come up with a generic version of, all around seem like some of the nicest shaker box screeners made today.