I didn't realize Navi had a show...

much agree

So much potential, but the scenes jumped around too fast and the end had that massive plot hole.
 
Still better than Deep Breath but Moffat clearly has used up all of his good ideas. I hope that this is his last season as showrunner.

Was it at least entertaining while it was happening?

I really loved how it looked, they seemed to really have a lot of fun with the camerawork and lighting this episode c: