The keyboard on the 12" Macbook is a very controversial topic. Some people hate it, some people don't mind it, and maybe someone even loves it.
I am writing this on it, and I'm not really sure where I land. Probably the middle: I don't mind it.
The hard part is that I cannot explain to you how it feels. I really cannot do it. It feels unlike anything else I have ever typed on. So I'm sorry, but you are going to go out to a store or something to try it out.
It doesn't feel mushy like a rubber dome keyboard, and it doesn't feel clicky and tactile like a mechanical keyboard with Cherry MX switches. It doesn't feel like any other laptop keyboard I have tried. It feels like it's own thing.
Thing is, despite the keyboard not feeling great. I am still typing great on it, both fast and accurate. It's just when you open up the computer for the first time of that day and you start typing and you kinda go "uhhh", and then after a while you almost get used to it, but not quite.
It's worth noting that my desktop keyboard of choice, at the moment, uses clicky Cherry MX Blue switches, and I have no trouble transitioning between the two.
So I'm not getting rid of this computer because of the keyboard, like some people. I have no problems with the keyboard. Would I prefer the keyboard on my old 11-inch Macbook Air or my more recent 15-inch Retina Macbook Pro? Yeah, probably. But those keys do kinda wobble and when you don't know better that doesn't bother you. But now that I can try to wobble the keys on this 12-inch Macbook, and they don't wobble, I kinda prefer this.
It feels much more premium.
(Other thoughts on this computer will come whenever I think of something to write about it. But so far, I have very few/no complaints. Battery is incredible, screen is ok, trackpad is fantastic, thinness is incredible, only one port hasn't bothered me so far... All around, very happy with it so far.)