Ok, so earlier this year, I decided I needed this tool because I was going to be building a playground for my daughter in the back yard.  I do quite a bit of DIY (Do It Yourself).  The thing about DIY is that there is no help, at least not at my house.  When it came to laying the upper and lower decks for the backyard play ground, this was a lifesaver.  It worked perfectly.  While I had only a 1 time need for this, it was the exact right tool for the job and I would not have been able to do the project without.  The decking was straight and true.