I'm rather disappointed, I came to this post to make a snide comment about cutting butter, but there's no way I can top those great remarks already here! Drat.
On a serious note, one thing to make sure of is to be sure you buy a true Zona brand when you get your saw. I cut ebony fretboards, rosewood fretboards, and maple fretboards with mine, no problem and no dulling. The thing I love is being able to buy different thicknesses of blades for my fretting use.