Hi @Feevrs1
Have you visited KW yet? I'm a current parent, with a child in one of the upper years who has been there since the school opened.
There is a bus service - ask the school for details. Only you can decide if it's too far but there are children who come in from Chelsea and North West London. Or you could move to Hammersmith!
School destinations for the inaugural Year 6 cohort are excellent. Ask the school for a full run down but it includes Goldolphin & Latymers, King's Wimbledon, City of London, whole raft of GDST schools from Putney to Francis Holland.
Headteacher Mr May is an absolute pedigree of a head with a track record from Eaton House etc. He and others are experienced and act as a guide and sounding board. There's a good amount of handholding from early on so parents know the lie of the land - especially important if they haven't themselves experienced the UK system.
Please do read their ISI report, it comes through loud and clear it's a happy school that produces results, and not just in the academic sense. Behavioural issues are, I understand, much rarer than in other schools as parents whose kids have come from other schools have repeatedly said.
The parent community itself is filled with professionals. It's down to earth and fun. No ostentatious silliness here.
If there are any further specific questions, please DM me.