The flakes themselves are super easy to use. Just a few drops (I think I use around 5 - 10 drops? Enough so that the soap flake won't ball up when I rub my hands together to lather it up. It took some trial and error to find my sweet spot) of water, and it's enough lather to cover my whole face and neck. I would liken the feeling of the lather to a gentle gel cleanser, and it rinses easily and cleanly. It leaves my skin feeling soft and clean, and NOT stripped (for reference, Hada Labo Gokujyun foaming cleanser makes me feel stripped). I only use sunscreen though, so I don't know how it will work with makeup.
Another bonus is the case. The pictures seriously don't do it justice. The art has some texture that the pictures don't show (the black lines are raised), so it really is a gorgeous and high-quality compact.
These are so convenient ! I had to evacuate for Hurricane Harvey and this was the only cleanser I grabbed because of their convenience. BUT...they also work SO WELL ! One flake is more than enough to clean your face. They leave my face feeling super clean, but not tight or dry. It also leaves it soft. I love these flakes and definitely recommend, especially if you're into convenience.