Well, I went this morning a spent a good hour or so wondering about the exhibition.
Whilst there were several pieces which raised a few smirks, as predicted, it was mostly dross - tired and obvious political messages which did little to inspire. It was an experience, but the worst art exhibition I have ever been to.
I didn't feel any emotions from the pieces apart from humour or irony, and that alone. There was no lasting impression or atmosphere, just disposable 'punch lines'. Here is a typical example:
http://farm4.static.flickr.com/3601/...9bc8543209.jpg
Whoa, deep.
Personally I prefer a less obvious message and being allowed to make my own mind up rather than being preached at (note, there were a few enjoyable examples that Banksy had on display along these lines, but they were rarer than not).
My girlfriend actually burst out laughing at the group of teenagers who proclaimed in awe at the aforementioned 'monkey picture':
"Whoa, that's really clever, it's like he's saying that all the MPs are stupid!"
So yes, worth a punt if you think you would be interested, but I wouldn't go out of my way for it. 4/10