Well, I've seen it, and I liked it. Because I'd been avoiding spoilers, I was surprised by the ending - which is not the generic deathfest I had expected (can't be more specific without spoilers). It certainly made me think, and I enjoyed it a lot more than the pointless PotD.

And since, for all sorts of reasons, I can't look forward to Moffat, I'm going to enjoy these last few Tennant-RTD-era episodes all I can!