I have boys at Chepstow ! But I am pulling them out ... Mostly as we are moving but also because the school is larger than what it was and I preferred when it was a small school.
In my option, Chepstow is a great school, very academically focused, lots of bright children and teachers with high expectations. On the flip side: no local facilities for sports so they are in the bus all the time, and the school is growing so fast that the focus is on that more than on running the school on a day to day basis. Overall it's a great school, I have no doubt the head teacher will get great exit results.