This UI has been modified for 1920 x 1080 res screens. It may look different on other resolutions.
It should work just fine for other classes too.
1) Back-up your Interface, Fonts, and WTF folders in your main WoW folder.
2) Copy the extracted folders into your WoW folder.
3) Rename the folders inside WTF folder.
4) Log-in to your character and type this line in chat:
/reflux switch renahui
Type /hs in chat to customize Hissy elements (DerpyUI)