Weeeeelll I went there. A long time ago though!
While I was there I never felt like I fitted in (despite achieving high grades and having good friends) and was relieved my parents let me leave to go to state school in the 3rd year.
I am perhaps being a little unfair though. It was a very long time ago! They did give me a good education in most areas.
To put my cards on the table, I just was - and still am - against the idea of private education.
I wonder what I can tell you that might still be relevant today. They had good facilities, a nice pool. You get people coming from quite far to attend the school (suspect this might be true of a lot of private schools). I remember a geography project we did, the average travel time was 45 mins.
I'm at my mum's tonight, so I just asked her.
She says it was very traditional. Your daughters will meet some very nice other girls. Some of the teaching was good in my day, but not all of it. There was a good orchestra. It's in an interesting location.
She has heard that the present head is more amenable to cooperating with the boys school than in my day. (A couple of my mates were put on report for talking to boys through the school fence at lunch. I always suspected the real problem was actually that the real problem were from the local state school, as other girls met their City boyfriends after school, with no problems).
Hope someone a little more up-to-date comes along soon!
Oh and of anyone does know girls there, please do tell them that it's thanks to us that they are allowed to wear black tight! We had to fight hard for that! (Grey and maroon were the rules).