The Modern UI design aesthetic seen clearly in Windows Phone has been subject to substantial amounts of both criticism and praise. The UI is a little unconventional in its method of navigation and aesthetics, and many felt it a bit strange when Microsoft introduced it onto PCs. However, it offers extremely clean visuals and a stylish appearance. In terms of aesthetics and customization, there’s really not much going on when compared to Android–monochromatic squares, rectangles of pre-selected shades, and a couple of default themes. But as we saw at the Build conference earlier this year, steps are being taken to make WP8.1 more customizable.