Uni-ball Propus Window Double-Sided Highlighter Pen - 4.0 mm / 0.6 mm Twin Tip - Yellow

VERY IMPRESSED...I need one in every color now LOL!

This has got to be one of the best inventions ever! The window really helps you see what you're highlighting, which is very useful for someone like me who tends to over-highlight. This yellow color is like a lighter/more faded version of the typical fluorescent yellow highlighter, but I'd recommend it if you want something that stands out more than the soft yellow one.

Loved this color as well as the other two I ordered... You do not even realize your looking through the window, but you do realize your not staying strait on the words your intending to highlight... love these... Oh and the small tip is great for underlining or highlighting small words on powerpoint printouts when you print 6 slides on one page.

I finally had to throw my pack of highlighters away recently that I bought in Japan, gosh, 7 or so years ago now that I think about it. I had used them before, but not as frequently as of late, so you can imagine what great quality if the ink never dried out! The window allows me to see what I'm highlighting so I know where to stop and it glides very smoothly. I also like that when I highlight textbooks, the ink doesn't seep through the pages.

This is a great highlighter, I love thw twip tip characteristic a lot, giving me options. The window may not help some people, however, I find it very helpful. I can always see what I'm going to highlight next and usually I highlight too much, so this has helped me. No flaws.