I am very particular when it comes to stationary, and I like to use ink pens, but I often find they run out quickly and they don't have enough ink in them for comfortable writing.
This is why the v sign pen is so good, it's really inky, it has lasted for weeks when I'm using it every day, and it has a nice thick nib that makes my writing look really neat. That said, the nib is pointed, so you can use it to be precise, and it won't look messy on the page.
It's ideal for anyone who likes scribbling lists, or for writing in cards, and they come in a great range of colours.
There is nothing particularly special about its design, it has no rubber grip or any features that make it comfortable to hold, but I don't think it needs them.