Consumers are increasingly gravitating toward so-called "convertible" laptops -- that is, tablets that attach to a keyboard, giving users the best of both worlds. Dell's new XPS 12 is no exception, at least not in terms of its foundational design: it has a folio cover, magnetic keyboard, detachable tablet, and stylus. We've seen all that before, and we'll see it again. The finer details are what makes or breaks a new offering, of course, and so we've spent a couple weeks putting Dell's new two-in-one through the wringer. Spoiler: the results are largely great.