I bought a wrench pen just to see what it was like. I have to say I was blown away by the concept and the way they write and handle. Three weeks in I have not used another pen and have gone on to buy the lumos and another wren as well as some inks. I have not had to refill the first pen yet and I do a lot of writing. They are a joy and an incredible idea, it doesn’t matter that I am left handed. They are beautifully made and very tactile. The inks are lovely. I am toying with a fountain pen at the moment. Amazing.