Uni-ball Propus Window Soft Color Double-Sided Highlighter Pen - 4.0 mm / 0.6 mm Twin Tip - 5 Color Set

The Uni-ball Propus Window is my favorite highlighter out of the whole Jetpens collection. The window is a neat design feature although it probably is not something many people would find useful. I do fund myself occasionally glancing through it to see the end of the sentence or text I am highlighting, I hate when I go over and begin the next sentence on accident. With or without the window I would not change my opinion on this product, the color intensity, ink flow, style of the duel tips, and feel on paper makes it far superior over any other highlighter I have tried and I have at least one of every highlighter Jetpens offers and many more. The orange is my favorite but I think every color is great and I especially like the soft color line. The width of the tip on the window side is awesome which is why I think the window design is great even if you never use the window. The ink rarely shows through on any type of paper I have used and the flow is so good that every stoke is uniform without any heavy spots at the beginning or end of the stroke. I would recommend this line of highlighters to anyone who asked my opinion. Hope this helps someone make a good buying decision.

wow I love these pens! The windows are awesome, and the colors are even brighter than on the picture!

Love these! nice and light..I hate dark highlighters so I am always on the hunt for pale ones. And these really fit the bill. I don't really notice myself using the see thru window tho, but it's a cute feature regardless.

This set of vibrant highlighters have gotten me through hundreds of pages of textbooks boring enough to make a rock snore. Their colors are highly attractive, the packaging could not have been designed better, and the product is double the use with double ended sides of different sizes.
The only concern I faced with this product was the ink flow. Many times, especially with the skinnier twin tip, large amounts of ink would flow straight to the tip and create a large blot on my paper. I believe this could be accounted through the angle of which you hold your highlighter.
Nonetheless, I highly recommend this set for all you busy body studiers ;)

I have been using these to study for my boards. They are great highlighters however they do run out of ink first or a couple of mine have although they did manage to highlight a good 25 to 30 pages before this happened. I would definitely buy them again