For this week’s ROM of the week, check out Illusion ROM.
Based on Android 4.2.2, Illusion ROM is an AOSP ROM (What is AOSP?) with great performance, battery life, and features.
First and foremost, Illusion ROM comes with Key Lime Pie (from Android 5.0) theme and wallpapers. You will be able to be one of the first to try Key Lime Pie theme although Android 5.0 release is far away. That alone is a great excuse to install this ROM.