These are to a card shuffling machine with robust housing and good workmanship. Since one and a half years This product is already with us without striking negativities in use. It is particularly suitable for card games like Rommy, Canasta, Phase10 etc., so many games with cards. Especially those who can mix, which were otherwise always rely on a team-mate as a mixer. In a short time they had such a very well received, that I again had two pieces backordered. A small disadvantage is perhaps the noise when mixing when the cards hit on the housing. But can be alleviated if man attaches a few felt pieces left and right. In addition, a card packet should be mixed always twice in my opinion, so that the cards are well mixed up. For Sheepshead and Skat example I would because of the small amount of cards but still prefer the hand mixture. In any event, all the players of our playgroup and I think this blender is a super power-packed fun for all ages, young and old. It is worth the money, whether for personal use or as a gift idea!