The Fein brand blades last longer than the generics, but they cost more.  This is a very functional design, I use this as well as the e-cut precision blades.  I like this style because I can keep turning it to an area with sharp teeth.  Nothing like a sharp tool when you need it, I like to keep a back up blade handy.  I use it for everything from cutting shims flush with the wall when installing doors, to sawing fiberglass during boat repairs.  It doesn't get into corners as well as the e-cut, but it does better on long cuts.  It is thin and bends easily, but can be straightened out quickly.