Google stock does have modifications but not many. It works fine. It is close to AOSP. It's things liek Sense and touchwiz it is not designed for.
Want to root/unroot? All important guides and info threads are contained within the "Sticky Roll-up" thread in General. Click the link below to get there!

**Sticky Roll-up: All Guides snd Info Threads linked here**

Philz Touch Recovery with passkey secure lock

I do NOT reply to support queries over PM.