You should, if you ever fancy a day in London! It's easy to get to on the Tube, and it's a few minutes walk along the river to see other cool things like the Tate Modern and the Globe.

If you haven't climbed before, they do a good induction course teaching the basics of bouldering. And as I was saying to astridv above, it's a really nice place, with a pretty chilled-out and friendly crowd.