I wasn't planning on buying this, but it was on sale and the pattern is beautiful, so I did. I now need to buy the pattern, Mystery XI, Celtic Garden Mandala, on the Chatelaine site.
I received these pens in a redditgifts exchange. Andreas put the cartridge in the fountain pen for me, but I've been too busy lately to try anything out. Frustrating! Not going to get better over the summer.