Why all the excitement only 4 stars? The pen shell has a maximum level of a cheap promotional pens. That's a pity. We can only hope that the manufacturer if successful the spring with a higher quality filler body connects. The technique would have deserved it.
Even the hint that you need something better for the pen writing paper. On the high end copy paper of a friend, the bar edges frayed out. On a cheap spiral notebook a discounter ink came through on the back and there were on the next page even a few ink dots. When you write quickly with the thin 1,5er spring, it is still somewhat, as long as you, the paper describes only one side. But he makes a lot of fun just on good paper.