Regarding the UI, have you looked at the "Settings" page? Most of the UI is fully customizable -- you can change almost all of the colours you see, you can even

Regarding the UI, have you looked at the "Settings" page? Most of the UI is fully customizable -- you can change almost all of the colours you see, you can even remove many features such as the icons, sidebar, 0-click box, even the ads! You can also adjust the layout of your results: alignment, page width, font and font size, underlining of links, etc. Clearly they've provided a multitude of options, you just need to try them out. Also, they do allow site search using the same syntax as Google.