I'm learning this song and its been great practice for me to develop my rythym, especially using the old faithful pattern. Almost got it down. In terms of BPM, Justin has it set at 132 on the app - i can play along at 122, so almost there.
I do struggle with the build up to the chorus on the D. I can do the 8th note strum alright but i struggle to transition smoothly into the old faithful again for the chorus.