I’ve yet to visit the Muji store in New York, but I used to go to one in London sometimes and always liked it. I never bought any notebooks there, but this is a great review of one: the Chronotebook, which offers a whole new way of looking at a daily planner. Each page spread shows an AM and PM clock face, and you can write in your appointments with a line to the time, taking up as much space as you need– more flexible than the hourly lines most daily planners offer.