We made the mistake of watching "Shut Up and Dance" before watching Season 6... Some of the older episodes put this season to shame.
My thoughts:
EP1: Enjoyed it.
EP2: Enjoyed it, but didn't feel like a Black Mirror episode?
EP3: Meh. Ending was disappointing, was about 30 minutes too long.
EP4: I didn't mind it. Again, not like a typical Black Mirror to me, but I actually loved the "aha" moment I had as soon as I saw the goats.
EP5: Not Black Mirror, 30 minutes too long, some okay stuff buried in there.