Being a University student having a highlighter is a necessity when you want to highlight the important points in your notes and textbooks. A friend let me try his Sharpie highlighter and I must say I was overly impressed with the product.
I found the highlighter to be very effective when I used in it my text books. I find that some highlighters tend to look dull once they fully dry. The sharpie tends to stay bright and vibrant for many years. This is a great comfort when looking back on my notes because I can easily identify the important points that I have highlighted in the past.
My only major guff with this product is that it doesn't work well when you highlight written notes or recently printed documents. Sometimes the ink smears and it leaves a black spot on the tip of your highlighter. This is really annoying when you go to use your highlighter on another document and you get a little black smear whenever you use it. The smear eventually disappears but I find this to be the only negative aspect of this product.
If you are looking for a highlighter that is really effective, long lasting, and stays vibrant on paper for many years then I recommend you try the Sharpie highlighter.