[Chalky] But OTOH, I like it just on its own. [Btd] I can't resist asking (in the typical debate-starting manner) why this bit of architecture is less intelligent than, say, St Paul's Cathedral. The best reason I can think of is that while this building looks like a jokily scaled-up sequinned amoeba, St Paul's Cathedral looks like, well, a cathedral - which depending on your POV suggests that Christopher Wren was less decadent than Future Systems. Also, some architecture critics have pointed out that Selfridge's is basically a shell-concept, with little of architectural interest inside it, so not a coherent bit of architecture? Are these your reasons for disliking it?
What does Maxwell Hutchinson mean by "architectural integrity"? To me, that would mean "it satisfies the purpose it was built for, keeps out the rain, and doesn't fall down", but he appears to have some moral concept in mind. Googling for some reviews of the place, I didn't see much mention of whether it works in that sense. I did see a lot of photography that one might accuse of lacking in architectural integrity, i.e. shots taken from unusual angles that give no idea of what the thing actually looks like.
[Projoy] Ever seen St Paul's from above? The facade is not part of the structure, so it's a shell just like Selfridges. It gives a nice impression from the street, but it's not what it appears to be.