I agree with Elibean. I think some private prep schools are rather bubble-like. The facilities are all so magnificent, the children all so earnest and keen, the classes all so fantastically manageable, the teachers all so committed. It really makes me want to poke a large pin into it all. I'm sure the children all really love it and it undoubtedly gives a fantastic academic grounding (there are some extremely "good" private schools around here, sending their progeny on to the best public schools), but it is uncomfortably removed from life as the vast majority of people know it and the children all give the impression they are blissfully unaware of this fact. This all-round niceness on the basis of never having any reason to be anything else is off putting, because it is so very separate. Most of these children would hate to go on to the local comprehensive after that.
I don't know about anyone else, but I have a constant battle in my head - do I want my children to be able to fit in with everyone else, or do I want them to live life in a bubble and become the next Prime Minister? And how "real" do I want their lives to be? I certainly don't want "reality" to be too rough and unkind for them. Or is the next tier down of private school more "real" - and would you pay for that, if you realised you could get your education for free if you stepped in one direction, or could get "the best" if you stepped in the other?
What, at the end of the day, do I actually want for my children? I realise that I don't actually want "the best" for them, because like designer clothes and the most expensive holidays, I don't actually think it is "the best." But then it leaves me wondering what I do want. Good enough and an ability to hold your own in any situation, I guess. And if I can get that from the State, then that seems like money well not spent. It's just a question of knowing what good enough is and how not to get distracted by the perks that money can buy. That is really difficult, because some of the perks are exceptionally tempting and some are genuinely useful (but to the extent that if you don't get them before age 11, you are excluded altogether???). My general conclusion so far is that a reasonable state primary is good enough if I have to make a choice between private primary and private secondary and cannot afford both. At secondary level, maybe the facilities, subjects offered and contacts made are more important if you have very middle class ambitions for your children, and a private school might be tempting for those reasons. And at least by secondary school age, I will know my own children's strengths and weaknesses better and will be able to judge more accurately what sort of school might suit them, next - and involve them a bit in the choices, too.