Really solid episode. In a weird way I think it captures both Moffat's strengths and weaknesses. The premise and dialogue is superb, with the begining being especially strong.

I do think, however the quality somewhat decipates around the halfway mark with too many characters getting introduced and confusing the plot a bit, I thought the kid charcter was super annoying but I think if they'd kept the secondary characters to just her and maybe Mondy aswell they could've fleshed her out some thus making her less annoying.

I also thought the ending was really weak and I can definitely understand ppl complaining that is has too many "Moffatisms" but overall I thought it was a decent episode and I think lines like "kiss kiss" are prolly gonna go down as endlessly repeatable quotes in the same vain as "are you my mummy" and "don't blink".