Looks like a nice tool but a little low to the ground. I built my own guide, a piece of 3/4 ply glued to a wider piece of 1/4 ply. The first cut with the skillsaw trims off the excess 1/4" so that the edge of the guide is the cutline. No measuring offsets that way. Between that and a pair of sawhorses does almost as good a job and cost very little.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.