A friend let me borrow one of these pencils one day at school, and I absolutely fell in love with it. The grip is comfortable, but not too soft that it is hard to write. Papermate makes a .7 and .5 model of these pencils, and depending on your writing styles, they work differently to your advantage. I personally prefer the .5mm because I don't like my handwriting to be thick, but the .7 lead lasts longer and is more durable. The eraser lasts very long, and when you do run out (which takes a couple months), the pack comes with an extra. The starter pack comes with lead, but it is only about 12 pieces, so normally, when I buy a new pack of pencils, I also buy a 3 pack of lead. I burn through lead quite quickly, and 12 pieces only lasts about 2 weeks of school, so buying extra lead is very helpful.
My only problem with these pencils is, that when you load lead into these pencils, you have to take the top off, which isn't a big deal, but for every time you load the pencil, it wears out what holds the top, and after a couple of months, it doesn't hold the top, so when you go to erase, the top falls off. This is my only issue, and it is very minor compared to all the pro's of this pencil.
Overall, these are amazing pencils, and I can't use any other pencil. My mom tries to buy me the cheap bulk pack of mechanical pencils, and I won't use them! She has to buy me these!! =D