I must say it is a very challenging puzzle. I puzzle love, but must discover that some parts look very much the same and also often times have the same shape. So I had the edge in two places new puzzles, because I had some parts set incorrectly. In places, the colors, depending on the light, bad to distinguish what it also does not make easier.
But, I do not see this as a drawback, on the contrary. Some puzzles are easy to me sometimes knit, here you have to show patience and smarts. But that's why we indeed puzzling ;-))
Top, 5 stars for quality and difficulty.