I would have given this mechanical pencil set a 5 star rating. It is a great set, with a wide selection of good colors, and the advancing mechanisms function very well. Provided that you don't press down too hard, when writing, the colored leads don't break, but that's true for even regular mechanical pencils. Fortunately, the colors all apply to the writing surface very well, so there's no need to apply a lot of pressure. The only reason that I'm not giving this product a 5 star rating is that the description said that they never need sharpening, which was something that I was skeptical about when I bought them, but assumed that they could have some new patented self sharpening mechanism. They do not. Fortunately, I already own a sharpener for 2mm leads, which works fine on the colored leads, so it's not a huge problem. I still like this set, and would have given them a 5 star rating if they wouldn't have said that they never needed sharpening.
Rating: [4 of 5 Stars!]