It is certainly a challenging puzzle but well worth the time!
I still cannot find all the corner pieces and it is very difficult for me but I am charging on. At this point I am separating by color - hah!!
Mindfulness was extremely helpful in fulfilling our order. But the puzzle itself is extremely difficult. I already put in about 24 hours and am about 20 percent complete. In many cases, it is pure luck if a piece fits. There are four or five shades of blue, multiple shades of all other colors, and only one basic shape to pieces.
Awesome puzzle! Hard but not frustrating hard! Definitely a great time passer and the picture is beautiful!