I got a sample of Iroshizuku Tsuki-Yo as part of an ink swap at the pen meet. When I first loaded the ink into my TWSBi Diamond 580 the ink was coming out too much too fast. After wiping my nib down, things are back to normal. The colour looks like a blue-green. It is a nice colour but it is too close to Noodler's 54th Massachusetts for me to consider getting a bottle. Though the Iroshizuku has a lot less nib creep and it doesn't smell. Plus it looks really pretty in my TWSBI Diamond 580. Just like the other Iroshizuku inks I have reviewed, Tsuki-Yo is well behaved and has a resonably good dry time.