Very Satisfying
I bought two customized small ones and one rainbow medium one. They are very well-made, very fun to play with, and look fantastic! I've been looking for this kind of toy for a really long time, and now I finally got what I want! It is perfect for people who need to keep their fingers busy to focus in class and solve hard problems. In particularly, this is a great alternative to playing with your keys or clicking with your pens in class or office, which might be quite annoying to the others.<br /><br />Although two of three metal knots are with customized colors, they still arrived at my doorstep within a week. Very impressive on that. I certainly wish the rainbow one can contain more colors--it now has red, orange, yellow, green, blue, indigo, and violet, which are indeed the colors commonly in a rainbow--but, it probably won't hurt if we have some in-between colors. However, this "standard" rainbow colored knot just look fine to me, of course.<br /><br />The other super trivial complain is that the name Möbii, which is I assume is a tribute to the famous Mobius band, is not mathematically correct here. Hopf fibration would definitely be way, way more accurate, but probably not a very good brand choice anyway. (Please ignore this paragraph which is pure nerdy talk.)
Rating: 5 stars