Excellent product. Does what it's designed to do in a small package. The weight is easy to hold. It should be possible to cut some corners before sharpening is required.
Pros
CUTTING CORNERS IS GOOD: Spring-loaded chisel sharpened and ready to use; The cutter is aligned on both edges to get the perfect 90 degree angle; Simply place in any recess or corner, tap with a hammer (not included) and remove any trimmings so you have a clean square (90 degree) inside corner.