I Think the big reliablity issue have been solved with the 2010 updates. I haven't heard the same bad stories this yr as last and my 08 went the entire season on a single topend. I did a leak down test and it was in great shape. Before the 2010 updates I went thought 3 top ends in 09. I think Polaris has gotten most of the issue resolved and the engine reliabity issue is as good or better then some of the other sled now.