i test drove the shindawia 8510 and stihl Br600 yesterday. I spent 10 min walking around with Shindawia 8510 backpack $519+tax blowing leaves in the dealers back yard. It took me about 15 sec to decide that the Stihl at $469+ tax was a better buy for me. the power was comparable, but stihl was a lot lighter and easier to use. So now I am the owner of Br600.