I saw this and walked on it last week, it is very solid and well-constructed. Great Pelican DIY spirit, I don't think that it would have been possible to hire someone who would have done better. The underneath part is very clean and dry, I immediately thought storage of some kind but, A) it's going to rain here eventually and, B) Wayne is not hurting for space in this house.
Count me among the people who did not think it would come out this well, glad to be proven wrong however.