Can't comment on the classes. But I like it because it's not as packed as some other gyms when I like to go which is mornings and weekends. After work I've been a few times and it's not that bad either.
The showers have really good water pressure from memory the couple of times I used it.
I think the one in Sydenham is cheaper but someone said it's way busier in peak times. Might be worth checking out. When it was an LA Fitness the facilities were really dire. But I have not checked it out since the new operator took over.