I am truly impressed by the Momento Magico, both by the looks (stunning deep blue resin) and the smooth stub nib. The pen looks very luxurious, and the stub nib gives a nice amount of line variation.
I also was very happy with the service from the Appelboom staff (I picked up the pen in person).
I ordered this pen with a medium steel nib, which is very smooth. The acrylic body of the pen is gorgeous. The piston mechanism operates flawlessly - it glides effortlessly up and down the barrel. This pen is a winner!