I LOVE THIS PEN AND YOU MUST BUY IT. I mean, this is the best pen I ever came across after being an penaholic, and I can't stop buying more colors of it. Mine is, as I saw in the bookstore I bought the pen in, limited edition, but the refills are not. I have black, blue and pink to match with my pink barrel. I use it almost for everything after I bought it and it is perfect. That also led me to buy more Pentel pens because they are normally perfect.
Here's a photo of the pens from https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcRCEkf5g6GZ7bfWkn3bJ8kSx5HrhcCmfyJi0DccoZ9pa8-tCeLa: