This is the closest to perfect mechanical pencil I have found. I like the weight, the durability, and I LOVE the retractable lead sleeve that protects my 0.3 mm ferrule from damage as I hustle between classes.
I only have one complaint, and it is almost a dealbreaker. I cannot stand the raised cushions in the grip. My personal preference is for a knurled metal grip, the more aggressive the better. I would spend as much as the pencil again for a replacement aluminum sleeve that covered the "non-latex pads".