You most definitely missed the biggest thing about that episode. I agree it started slow/boring, but it goes to 100 in the blink of an eye.
Edit: I thought I'd add that that episode did take me two tries (I fell asleep during the boring part the first time, but watched it again 'cause I had faith inspired by every other black mirror episode).
Edit: I thought I'd add that that episode did take me two tries (I fell asleep during the boring part the first time, but watched it again 'cause I had faith inspired by every other black mirror episode).