My friend that just bought the new 72" Cub Tank with the 37 hp Kawasaki told me if he had it to do again he would not have traded the Hustler Super Z 66"/28 efi. He said he like the power of the bigger engine but the 28 efi was plenty sufficient on the grass he cut with a lot better fuel economy. He said the Cub Tank rode a lot rougher than the Super Z with flex forks and he thought the big roller on the back of the deck promoted some of the roughness on the Tank. The last thing he said to me before we stopped talking was if I even considered trading, go back with the same 66"/28 efi Hustler Super Z. I told him my mower had been nothing but as near perfect as any mower I had ever owned and I would not consider anything else unless they had a 36 efi and then I would trade tomorrow. This man is 60 years old and has run ever mower made so I trust his opinion more than any one else. I have seen him run a mower 50 hrs. and trade it because it just did not meet his expectations and he will probably trade this one shortly from listening to his tone of voice while talking about the Cub Tank and he has the best one they make.