I have loved my 2001 vermeer1800a! This chipper is great on fuel and is great at all around every day jobs. I do a lot of big brushy trees. This chipper is not near as heavy as my friends bandits or morbarks and easy enough to even pull behind my gas powered 2004 chevy 2500 to take to vermeer for repairs(which is very rare). I have a 2006 ditchwitch sk650 that i feed the chipper with and don't have a winch on it. I cannot stress to you how important it is to buy a chipper with a winch. I love feeding the chipper with my mini skid, but have worked with other companys that have my same chipper with a winch and production is doubled if not tripled when you have one.(So get one with a winch) The bandit 1890 is an absolute beast. This chipper does do a better job at crushing big limbed material and eating logs due to the horizontal feed wheels that have a hydraulic crushing feed wheel design. The negatives that i have seen with this machine are the axles have not been sturdy enough for this machine and the fact that if you get a double axle chipper you need to have a cdl driver.( my friends bandit 1890 only has one axle) Another tree company I have worked for has a morbark and there 15inch inch chipper has more cracks on welds and metal than i can think of. This chipper also has horizontal feed wheels which helps in crushing material. There are roughly 7 tree companys that I can think of in my area that run 15 inch and up chippers and out of the 7 tree companys 4 of them run vermeer 1800's. For the simplicity, for the ease of towing, the ability to handle medium to large material and less downtime due to repairs.