I did like the episode a lot, but not as much as the rest of the series (voted good rather than very or excellent for the first time)...
I guess the great thing about this series of Dr Who is that different episodes appeal to different people. I don't normally watch dramas (not serious ones anyway) - I'm more of a comedy and sci-fi fan, so I prefer the episodes that have more emphasis in those directions. That's why I think some people really didn't like this episope whereas others loved it - it depends on whether you tend to be a drama lover or a sci-fi or action lover (so there are comments from some people on not enough aliens or other planets, whereas from other people I never thought a sci-fi programme would get me so emotionally involved). For the series to be a popular success it needs to keep all the elements in each episode to a degree, so people aren't driven away - and I think its succeeding so far.
Drama is more mainstream, so the Radio Times seemed to like this episode more than last week's whereas I personally preferred last week's.
p.s. Was it just me who couldn't stop laughing at the ferengi ears comment about this doctor in last week's dead ringers?