I purchased a Jabiru J170 from the factory because it was within my price range and I like the endurance, double that of many similar planes. I believe that most problems are caused by owners dicking about with the engines. (Notice I said 'most problems'.) The Gawler flying club regularly gets 1000 hours out of their engines and those planes are flogged by students most days of the week. The fuselage is second to none, and very roomy. The only thing I do not like is the way the J170 floats down the runway on landing, doesn't settle real quick like the shorter wing J160. Anyway, that's my opinion, have fun...