I realise that other people have addressed this question but seemingly for junior school children.
My DS has been offered places at MCS and Abingdon School (Well done DS!). He missed the Bucks Grammar School test by 6 marks from an Oxfordshire primary school and Not Very D EX-H has said that he doesn't want DS to go to MCS because he will be overpowered by the academic requirements of the school. I love MCS. Normal kids with normal parents. Fantastic results, excellent pastoral care and small enough to care. MCS have told me that he came near the middle in the test but they saw bags of potential in him and the Deputy Head (Usher) who interviewed him had written "Must Have" on his interview notes.
Please could existing parents give me some advice on this and make comments on how their child has fared there, particularly when coming from a state primary. Also could Abingdon parents please advise me on the pastoral care at the school as I am concerned that there have been some issues with yr 7 boys that have not been dealt with well? I do know parents with boys at Abingdon but only people whose children have now left MCS (they rate it highly but I need an updated view).