These Frixion erasable highlighter pens really work as advertised, at least on non-glossy books and paper. The marks they make look exactly like a regular non-erasable highlighter.
The eraser is smooth and by rubbing on the paper, it produces heat, which causes the highlight mark to vanish completely.
I used one of these recently to highlight a multi-page legal document that a relative had to sign and initial on lots of different sections throughout the document. When they were finished signing and initializing the document I erased all the highlight marks and it look nice and neat.
