Ravensburger Krypt Inside The Riemann Sphere 654-Piece Challenging Jigsaw Puzzle for Adults – Unique Pieces, Softclick Technology for Perfect Fit | Brain Teaser, Home Decor, Gift Idea for Puzzle Lovers

I liked the quality of the pieces and the spiraling part, which really set it apart from other puzzles I've made.I thought it'd take me 3 or 4 hours, but it took me around 8. I couldn't leave it until I finished it, so it's a bit addictive. Sometimes it's hard (in a good way) to see which part of the puzzle you're working, since the center of the spheres are very similar, so you have to think of a different strategy than you're usual one.Purchased this for my wife, who loves to puzzle. She absolutely loved it. She told me it was challenging enough to be enjoyable, but not so much that it became frustrating. For comparison purposes, she typically does 1000 piece puzzles and puts together about half a dozen per year, so she's not a hardcore puzzler or anything. And she really enjoyed the spiral-cut pieces, which was a new experience for her. The pattern was really cool to see once it was finished, as well.Great quality puzzle, as expected from Ravenburger. This puzzle has the same blueprint as the original "Krypt" which was a puzzle of the same size but completely solid metallic/silver. Both come with a full "map" of where each piece belongs. This one is not that difficult given the colors and odd piece shape so you do not need the instructional page. It was not a difficult puzzle at all. I finished it in a day (prob 2-3 hours). Worth the price. Beautiful finish product.I love this puzzle, it offered a bit of a challenge. Don't even bother using the diagram inside the box, it won't help you one bit. I chose to do the puzzle without the instructions. I am also happy to say, not one piece was missing!!Very unique, beautiful color patterns, still working on it, even though its my 6th Ravensburger puzzle this year, it is by far the most difficult.Haven’t finished the puzzle yet, just opened it up and it came free with a used coaster and someone else’s hair? The box was sealed, we are very confused.I hope Ravensburger makes more krypt puzzles I loved the challenge. Please make harder with more piece's like a 1000 0r more.Not as hard as it looks but still a rewarding challenge.Elegí este puzzle por 2 razones:Ravensburger es una fuente excelente para Puzzle de alta calidad; y el motivo es inusual y me encanta.Cumple con todas mis expectativas: motivo de un gráfico excelente, detallado y limpio, con colores muy bonitos, las piezas se juntan perfectamente, las formas de las piezas es diversa,Lo recomiendo al 100%.Sono un'intenditrice di puzzle e devo dire che questo è proprio bello! Mi è stato regalato e l'ho trovato veramente piacevole da fare e originale. Consiglio!A little pricy, but if you want a challenge or are gifting it to a puzzle lover, they will love it. The puzzle itself seems to be great quality but I don't think the price matches the quality. Great product if you got some extra cash.Es un puzzle fantástico. Parece un fractal!!! Esferas con forma esférica.El único pero...se hace rápido! Muy buena calidad de piezas.Esemplare di Puzzle spettacolare. per la prima volta ho fatto un Puzzle tondo. Non mi era mai capitato e all'inizio non e' stato facile! Ma la diversita' dei colori mi ha aiutato.