I hate typing on it, I hate the trackpad, it’s slower than I expected, the screen is noticeably blurry from non-native scaling to get reasonable screen space, and I don’t even find it very comfortable to use in my lap because it’s too small.
The 11-inch MacBook Air shows that the MacBook’s compromises have nothing to do with going Retina — the One has roughly the same GPU, less horsepower, less space, less weight, and a smaller battery, yet still drives a Retina screen perfectly well. Apple could have made a Retina MacBook Air instead of (or in addition to) this new MacBook, but chose not to.
This concerns me more than you probably think it should. Not only does it represent compromised standards in areas I believe are important, but it suggests that they don’t have many better ideas to advance the products beyond making them thinner, and they’re willing to sacrifice anything to keep that going.
Marco hated the new trackpad so much that he just bought a discontinued MacBook Pro with the old one. I think everyone else I’ve read has liked it, though. I remain happy with my 13 inch retina MacBook Pro, so I wasn't interested in upgrading at all.