I have sky Vac equipment and often rely on the crevice tool for getting into the narrow space where the roof tiles hang too far down into the gutter and the usual tool won't fit in . I also use it for the square ends of gutters - I'm a bit OCD.
It does have a tendency to clog but one would expect this because of it's size but a good accessory never the less.
If for some reason I mislaid mine I would certainly be onto the guys at Sky Vac for a replacement so I certainly don't think you'd be wasting your money having it in your bag of tricks.
