Our trusty Kohler powered commercial Craftsman lawn tractor is on it's 15th season and running strong in spite of a hard life between lawn and field mowing. I just did its first belt replacement. It has chains on the rear wheels to help with steep slope mowing in wet grass. The seat is starting to look ratty but it just keeps going. All I do is regular oil+filter and air filter changes. When I eventually replace it I probably will look at the JD.