I've used some fanless Ideapad before this with Core M as well, let's just say there is no comparison. With that one a tiling WM was very much a necessity.
My office PC is a very generously specced desktop, but for user interaction tasks like coding, browsing etc there is no appreciable difference with MB12.
My office PC is a very generously specced desktop, but for user interaction tasks like coding, browsing etc there is no appreciable difference with MB12.