Works well while sharp. I love the Fein tool, but now that everyone else is making multi-tools I find that all the the blades for the Fein are twice as expensive as thier competitors. That hurts the value of the tool.
Great due to the ability to orient the flat edge of the blade to access tight spaces. Makes cutting in tight spaces easier than using chisels, etc. but must be patient and let the blade do its job - a little slow, but very steady.