Pilot Frixion Erasable Highlighter —
For a long time I've been wishing for an erasable highlighter. You can erase pencil, you can cross out pen errors. But how on earth can you correct a highlighting error? Yesterday I thought I'd hit the jackpot when I found a three-pack of Frixion Erasable Highlighters by Pilot. A highlighter with magic invisible ink that disappears when you rub it? AWESOME!
Too bad the reality doesn't live up to the hype. First, it doesn't highlight well. I had to go over each area two or three times to get a bright, even color. Hmm, what's the point of a highlighter that doesn't highlight? Second, while the product leaves toner on the paper where it belongs, it picks up inks and smears them. So don't use it for hand-written ANYTHING.
Overall I'm not too disgusted, because I usually make highlighting errors on printouts, and as I mentioned the friction doesn't pick up toner. So for my uses, the extra effort needed to get good color is worth the convenience of not having to reprint a project map when I highlight a section we haven't actually done yet. (And it does effectively erase itself.) But for most people I wouldn't recommend this product - it has a lot of limitations.