Without putting too fine a point on it, nearly every year 6 child in Stover prep passes the 11+. Most of them do in go to the grammar schools
(boys and girls).
Rather fewer stay into the senior school at Stover .I think many parents use Stover prep as a way of getting into grammar school and this get free state education from 11 - 18. Since prep school fees are less that senior school it makes sense.
Mostof those coming into Stover senior are the ones from state schools who didnt pass the 11+. You have to consider that when looking at the GCSE results (which in fact are good but not well publicised).
My eldest went to Stover, took A levels ( AAAA) and went on to a top university. Stover has good pass ratesat A level and good university destinations. My middle one is still in Stover ( and did pass the 11+). I decided to keep DC at Stover because middle one likes familiarity and routine (not SEN, just the way he is). It also means I am not running around like a blue a*d fly taking them to different schools. Its convenient.
My youngest is in prep. I worked many years ago at Bude Community School. Like Newton Abbot College, its a hell hole school to teach in. Its dire to be a student there unless you are top sets only and then, as you can see, I didnt put my DC there.
Be careful about the GCSE results these schools show you. They are well manipulated.
So I speak as a mum of course and I could be considered biased as I have my DC there. However, what bias do other posters have? Or maybe you could ask what they really know if their DC (or they themselves) are not in the schools? Of course there are always some parents who dislike a school. Most of those I know do like Stover ( well we would, we send our DC there) Most who leave seem to do so for financial reasons.
There are many things I could suggest are not good about Stover, just like any other school but on balance, the education standards and care are very high.
Btw, BOTH my children HATE the Stover uniform. It is not "natty" In fact, even I dislike it. Its an awful green colour and really looks quite scruffy really. If you are looking for a "posh uniform and thats the be and end of important, then I would suggest Exeter School or Cathedral School or Trinity.