I bought this tapering jig prior to tapering my first table leg. It was inexpensive, I was inexperienced, 'nuff said.  The surprise came with its performance.  Although I am confident that I could bend this thing in half  if I was in the right mind, it does a really good job of guiding my  workpiece through the saw.  The adjustment feature is simple and easy to  use, but the "graduated scale" is a bit hard to use accurately.  To set it up, I simply adjust it by eye and then measure from the blade to  the trailing edge of the guide.  This trial and error usually takes no more  than a minute or two, and the jig stays locked on my final setting for as  many cuts as I need to make.  Although there are nicer, more expensive  versions out there, you cannot beat the value for the money with this tool.