Love these keycaps! They look and feel great. I only wish that the \backslash key was in Cement, and that there was a "Fn" key (using the extra Win for now). There are small imperfections from the molding on the back side of every key (see picture below). These marks don't bother me because they are not visible when using the keyboard.
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Also, did anyone else receive a Tai-Hao rubberized key extra in the box? How did they know I was curious about how these felt?! I like it. Massdrop should drop the set of 8 of these instead of the set of 18 available now. I would order that.