Difficult, challenging, beautiful
I received this as a gift.  Obviously there is a challenge as this is a black and white puzzle with various gradients of gray.  What made it so difficult was the lack of variety in shape of puzzle pieces.  I discovered early on that completing the frame first would be a mistake as it was too easy to go wrong. It took me much longer to complete than other puzzles of this size. There was a great sense of accomplishment when the puzzle was complete.  Pieces are sturdy and once you get a feel for how they are sized, they fall into place nicely.  Don't force or "encourage" any of the pieces - if it doesn't work easily, it doesn't belong there.  It's a beautiful puzzle. (seems overpriced - not sure if my friend paid the price listed, she did not buy from Amazon.)
Rating: 5 stars