Hi - yes I am ex KEHS, pre league tables
So schools went on "reputation" rather than actual figures. i lived in Solihull where there were lots of GS and could have gone there.
KEHS was great, free (as Solihull paid) and we were a very lucky bunch who went there.
However...... it was a long way and grim travelling in winter, lots of standing around waiting for connecting buses etc etc .
University station hadn't been built so it was down to buses - tended not to be much after school at all - occasional drama rehearsals etc but that was it.
Missed out on friendships locally - lots of people I knew went to local GS and secondary schools- then they all went to the sixth form college.
When it came to my kids I aimed to send them to schools nearby (or in fact move very close to the GS!!).
I still think that mega facilities are only great if you are living on site eg boarding or very close - hard to use them fully otherwise.
Am now supporting kids at Uni - rather glad I saved on senior school fees