Hi NewLife4Me,
Really pleased to hear that your daughter is getting on well. I just wanted to say that I have experience of that school, via a close family member who boarded from the junior division to the 6th form. Like your daughter they had a good time there in the sense that they were a total music freak and felt that they had found a place among their own kind but, as an adult, they, and many of their contemporaries, do not feel that the school served them well as children rather than musicians.
I believe there are serious concerns about the way the school handles pupils' emotional wellbeing (even if we ignore for now the devastating safeguarding failures of the past, which current senior management is still dismissing as "historic" and has not yet apologised for. The school won't even engage with the victims of convicted sex abusers.)
Many children do thrive there, but the musical talent can make some of those children seem very mature and adult when, in fact, they are often emotionally and socially quite immature and the school does not always remember that they are human beings first and talented musicians only after that. They boast about those alumni who have musical success but refuse to engage with those who have had emotional and other difficulties later in life arising from their time at the school.
Your daughter sounds far more robust than my relative but I would urge you to keep probing away about how she is feeling throughout the whole of her time there and be very alert to any signs of trouble. The school really works best for those children whose parents take their side, rather than accepting the often rather glib assurances offered by the school when problems arise. A musical career can be pursued, particularly in your daughter's instrument, without a need for a specialist music school at secondary level - junior conservatoire pupils who attend at weekends only and do NYO and similar in the holidays are just as successful at music colleges in the long run. So parents shouldn't feel (although many do) that they are held to ransom by the specialist music schools and shouldn't be put off challenging the school for fear of disadvantaging their child. If the boat needs rocking, get in there and rock it. Your child will thank you for it in the long run.
I don't mean to scaremonger and, I would also say that you are very fortunate to have a confident daughter who plays an instrument which is not in one of the historically problematic departments at that school. But I wanted to encourage you, as I'm sure you already plan to do, to keep her talking to you as much as you can and be ready to jump in and fight her corner whenever necessary. Hopefully the need will never arise in her case but it is something I really wish my relative's parents had known at the time and so I wanted to pass it on.
The school tends to inculcate a mindset where your worth as a human being is measured in terms of your musical ability (as determined by the school of course) and it's important that parents ensure that contact with the "real world" is maintained so that, if a performing career doesn't work out for one reason or another (and the reality is that it won't for the majority of these pupils), the child is not left feeling as though they are a "failure".
Best of luck to you and to your daughter!
ps. just to add that my relative now has a career as a solo performer (the only one from their year to do so - despite being seen as very much an also ran musician while at school) in case people think this is sour grapes.....