We are deciding on whether to accept an offer from WHS or KGS. DD seems not bothered by the co-Ed vs single sex (and we, as parents, can see pros and cons). Both academically strong and down to earth. We prefer the WHS curriculum and their positive encouragement of extra-curricular and logistics work much better (25 minutes on public transport). We found KGS a tad warmer, making more of an effort to engage during the admissions process and like their maths reputation (DD's favourite subject) and strong art department. Logistics do not work so well - 45-50 minutes on tube and train.
Any direct experience of one, both or even having made this decision.