A truly beautiful puzzle - vibrant colors, interesting things to look at, and the quality was excellent - better than puzzles I've bought at the $50 mark. No bent nubs, no missing pieces, no loose fits, no pieces that fit in multiple places. The pieces locked in beautifully, but if you wanted to unlock two pieces for whatever reason, doing so did not cause damage to either piece because the pieces are sturdy.
Incidentally, I picked this up during the Damaged Box sale, and there was no problem with the inner contents. The box was dinged a bit on the one edge, but who cares? If you keep the box, just put the dinged end towards the back of the shelf.
I did this in a week, and glued it. I usually am a one-and-done puzzler, but I debated redoing this - that's how much I loved doing it. Puzzle Sensei will just need to come out with more puzzles. Looking forward to doing the others.