I am a pen snob and stationery junkie and these are, by far, my favorite pens to use. I love the feel/grip of the silicone, which makes writing even easier - I don't have to hold it as tightly as a metal or plastic covering. So, fewer hand cramps.
I do take issue, however, with the shipping costs. For a bunch of lightweight pens, the cost is entirely too high (and I've done comparisons and even checked with the local post office on the cost of shipping). Even if I wanted to buy a bunch of pens, say 20 or so, the cost to ship these is half the cost of the pens themselves. It's so disappointing, because I really want to order a slew of them, but I can't justify the cost of shipping.
I found similar ones on Amazon and elsewhere but they aren't as high quality (or fun!) as these jotters. I hope the shipping costs will come down at some point.