I have a dd currently in Y8 at Parli.
After much debate we put Parli as first choice, over LSU or Camden Girls, and above the selectives that dd was borderline for.
We're really happy with our choice, no regrets at all. Parli has a lovely buzzy creative atmosphere, outstanding pastoral care and good relationships among the girls. Academically it's good, though obviously not a hot house - they differentiate the work well, and set creative, interesting homework in manageable quantities. They're ambitious for their high achievers, but thoughtful and careful about supporting those with difficulties.
I know quite a few families who've chosen Parli over CSG, including several who sent older dds to Camden but younger ones to Parli, make of that what you will.
I was concerned when they announced that Mrs Higgins was leaving, but now they've appointed Ms Creasy I feel pretty confident it will continue in the same vein - they have a very cohesive SMT and middle-management team with a strong vision for the school. And I'll say again that the pastoral care is very very good - at our first Y7 parents' eve her form tutor was fully up to speed on my dd's friendship group, which girls from other tutor groups she was friends with, who she was hanging out with at lunchtime, and what extracurricular clubs she was taking part in. They're very thoughtful in how they apply discipline, it's the antithesis of the zero-tolerance-detention-for-breathing-wrong kind of policy. And the girls respond well to it as far as I can tell, there seems to be very little real unkindness or bullying. Obviously there are different friendship groups, but we've not come across the kind of scenarios where the cool girls try to psych out the bookish ones, or anything of that kind - it seems to be fine to just be who you are.
My dd is quite quirky and did have trouble with being picked on at primary school, but she has really blossomed at Parli. Happy for you to PM me if you want to know more.