If Wisdom are still using Riverstone Demolition, you made the right decision going with someone else for your demo. We got them to arrange our demo and it was one of the worst decisions we made in relation to our build. It was the most unprofessional demo I have witnessed, and I have now witnessed 5 in my street including mine. What took other companies 4 days, took Riverstone 3 months not to mention all the other problems they caused. Wisdom won't take any responsibility for any issues they cause either.