I am a farmer that has put 370 hrs. on 2 Hustler Super Z's since last year.I traded up from the 25 Kaw. to the 27 hp Kohler and could tell a difference in power. I would like to have all of the pros and cons of the new 28 EFI, difference in fuel economy, power, maintence and anything else that might be relevent. I am thinking about trading if anyone can show me the difference . The Hustler Super Z is by far the best ZTR on the market and I have been around all of them. The manufactors interest in their products and the people who buy them is a testimony in its self. The only problems I have had was with paint quality on the first mower (this paint process has been completly changed) and the fuel caps leaking on the second mower. The customer service could not have treated me any better or resolved these problems any faster if I had been part of their immediate family.