We joined Lyceum a couple of years ago. The school clearly had lots of upheaval in the last few years, though that seems to be settling down under new and steady management.
The new building is definitely a great improvement. It is full of light as the PP said, and has quirky street art throughout. Now that there are actual classrooms with doors, I expect the learning environment is much better. Plus, DC says she's getting extra fit climbing all of the stairs! However, one unexpected down side we've noticed with the new building is that the kids are a bit less active in break time - they no longer go use all of the various playground in the area but stay in on the astroturf at the school. As there isn't playground equipment, it can be a bit limiting physically.
The main reason we switched was that the Lyceum seemed to get kids into much, much better secondary schools than DC's previous school (also an independent school). We also liked the small class sizes, the strong music programme and the previous head. Once we joined, we particularly loved the light homework, working parent friendly evening performances and the emphasis on being kind!
All that said, I'm not as happy with the academic side of Lyceum as I'd like to be. Indeed, half of the parents in DC's class registered concerns at the end of last year about the academic side of things for the class for this year - and the response from the school at the time was not particularly helpful. I can only hope that as the year unfolds that the school will prove that they really have been listening. (I'll keep you posted!)
When it was clear that the school wasn't going to take on board the parent feedback, I sort of went into overdrive lining up some outside of school tutoring / enrichment type things. Those outside of school learning opportunities have really brought DC a lot of confidence and sheer joy in learning, but I wish I hadn't had to go looking for them.
I do hope the school gets better at taking on board parent feedback, which does link into... The only other issue for me has been a feeling of something like a total lack of customer service. I tend to think that if we're paying this much money for a service/product, we should be treated like valued customers. And that isn't currently the case. (Though I get that is an issue with the whole sector!) It can leave a sour taste in the mouth particularly after paying the bill, so just be warned.
I don't regret moving DC to Lyceum. Mostly. And should DC get into her preferred secondary school (whenever we figure out what that is), then I won't regret it at all.
Hope it helps to have feedback from a real person with mixed feelings on the school?