OK, I thought the opening ceremony was blinding - though I'm not so sure about the NHS bit, which felt a bit of an odd thing to parade (GOSH, yes - it worked). Yes there was no metal, but there was Pistols to Prodigy (and Led Zep) so not all bad. As well as Floyd.
And as for the mistake with the North Korean flag - well, it was a complete and utter embarrassment, I'll admit it. But please remember, the entire world outside of the UK seems to have a problem knowing what the English flag actually looks like.