Our daughter started at SWGS this year and she loves it.
We didn't get a tutor - we briefly considered it but he was a waste of time - so my husband did a few practice papers with her across a couple of months so as not to overwhelm her. I was surprised at the level of the questions to be fair - these aren't subjects routinely covered in Y6 and she's only started to cover some of the subjects (especially in Maths) at the back of this term that were in the 11+ paper - which strikes me as being particularly unfair. That said, our local primary school was a disaster zone of underachievement so that may be it: the mere idea of sending one's child to a selective school was treated in the same way as announcing a fondness for eating dog poo - but you've just got to push through the 'race to the bottom' 'gibbsmedat' mentality and do what's right for your own children.
The girls seem to love the place and the size of the forms and year groups mean that every girl will find a good friend by the end of the first term. The school is remarkably well appointed although some of the buildings are a little dated now - and the smell of boiled cabbage hangs in the air some days... The school demands a great deal but the girls seem to be bearing up under the load, noting that some of the parents are quite...determined...and I'll leave it at that I think. :)
SWGS will place girls in forms so that they with girls who live near them. This really helps with car-sharing, but the bus services are fantastic, and there are hundreds of SWGS girls walking down into town on a daily basis as it is so close.
Homework ramps up after the first half - but it makes the girls focus on prioritising their work loads and applying themselves - which if they are going to be a success in life, is a useful lesson in itself. The girls are treated like grown-up young ladies and they mature quite quickly but not beyond their limits. I know some of the girls in my daughter's class have formed a Harry Potter fan club so they're still allowed to be children - and quite right too.
So she loves it, and will never look back. It's not for everyone - but then it wouldn't be selecting the best and the brightest if it was, would it?