Advantages: Grip is good, colour is pretty, and doesn't wobble or makes any rattling noises.
Disadvantages: I do think out of every other pen I own, the writability isn't that well, I'll still choose Pentel Calme or Uni Jetstream over this.
Disadvantages: The refill is specific to Blen and doesn't take refills of Jetstream, Calme (Calme also has it's own refill specification and it's smaller than other international refills), Sarasa, or any other Pens like Muji and Uniball One P as well.
