These blades are just so awesome.  I live in a house with plaster walls and could not stand what using a regular jab saw or my Milwaukee Job Saw did to the walls when they needed to be opened up.  That's when I met the Lenox plaster blade.  The teeth really do much better at cutting smoothly on the plaster and keeping your work neater.  You don't have to do extra scoring in order to make neat cuts.  I have not used them much, so I can't comment on the longevity of the blades, but if they run like a typical Lenox product, I think I will buy more of these in the future when this batch gives out.  Definitely a great purchase that can cut down on the amount of patching I will do after working on things.