I have read the other reviews: for those of you that do not like it, I respect your opinion. However, there are many mechanical pencil designs, but all others that I have found leave the writing end exposed causing it to poke you if placed in a pocket. This pencil not only has a great feel if you prefer a "fatter" writing instrument, but when closed it protects the lead and yourself. As for the covered eraser, that fits the design by not exposing the wearable material. It also includes a pin cleaner to clear out broken lead from the tip. As for durability, I purchased mine when I was an engineering student in 1978, and I continue to use it to this day (that's 40 years).