The bows are great, but as mentioned the kickback factor is something you should be very careful of, there is little room for an error. The major thing is that you have to keep that spur dug into the wood before you let the front of the bow touch anything, and don't let it snag anything other than the log you are cutting. As far as the clearing guides, they are for clearing fire lines and cutting christmas trees and such, but I have no idea how to safely use one,'
J.D.