You may as well request that people tell you about state education, motor vehicles or rock music.
A million and one variations exist.
This being STW you’ll also get a load of bitter old lefties with chips on both shoulders, spouting off about something they know nothing about.
I went to both private and state schools. One of the private schools was good, one was okay and the other was bloody awful. Conversely, I attended a pretty poor state school and a truly excellent state sixth form college, http://en.wikipedia.org/wiki/Peter_Symonds_College, which consistently ranks in the top 10 nationwide.
Private schools are not necessarily better than state schools, you’ll also be surprised at the range of parents who choose to send their children to them. Private schools educate around 8% of the nation’s children, they’re not all like Eton. You won’t be rubbing shoulders with the landed aristocracy at the majority of them and based on my own experience, snobbery was notable only by it’s absence.
I have however, experienced no end of inverted snobbery from jaded old class warriors with an inferiority complex.
Do what’s right for your children, nothing else matters.