I've used the regular size pencil before and I loved it. The formula was super long lasting and pretty much waterproof for me. It was beautiful and really stayed in my waterline. However, I got the skinny version because the regular size version was either out of stock or they might be discontinuing it. The skinny version has the same formula, but I don't have a sharpener that has a small enough hole to sharpen this pencil. I tried doing it with a regular sharpener, but it ended up ruining the tip of my pencil and it won't sharpen correctly.