I found it to be an enjoyable two-parter, but then I have a soft spot for lizard people.
A bit predictable that what's her name ended up killing the Silurian, that taser in part 1 gave that away. Likewise, though I'd read spoilers before hand, I'm sure I could have figured out from the scene with the engagement ring in part 1 that Rory would be written out.
Still, a solid enough episode. Nothing special but entertaining enough.