I have had my Hustler super z for 2 years and I have approximately 200 hours on it. I have had to replace the clutch, coil, 2 spindles. Luckily all under warranty but my warranty is up in 3 weeks. I had an Exmark laser z that I bought in 2001. The Exmark has approx. 500 hours and I have had very little problems with it. Hopefully my experience will get better. When my mower is not in the shop I love it but it is getting old having to run it to the shop.