A few more reviews out, now. A couple came through on saturday, when I was having a bad day for other reasons, and I can't say they cheered me up much:
Here's the Guardian:
http://arts.guardian.co.uk/theatre/drama/reviews/story/0,,2131619,00.html
And the Times:
http://entertainment.timesonline.co.uk/tol/arts_and_entertainment/stage/theatre/article2106274.ece
And a nice enough one in the Stage:
http://www.thestage.co.uk/reviews/review.php/17434/pretend-you-have-big-buildings
I haven't seen any shows this week, but I'm eager to see how the play's evolved during the run, and will be up on thursday, when there's also a post-show discussion.
I moved to a flat in Brixton on Friday. It's on the fourth floor. The views are quite something. Lots of big buildings.

Hi Ben,
Don't let those reviews get to you... I've heard some great things about the play from friends that have been to see it.
I'll be going sometime next week, once my play is over this week!
I saw you at the discussion panel at the Exchange a couple of weeks ago and loved it!
All the best with the rest of the run and future projects.
Sally x