If I had a windows phone I'd totally check it out. The screens looks nice and concise tho, very mango style; how much of that layout/flow do you get 'for free'

If I had a windows phone I'd totally check it out. The screens looks nice and concise tho, very mango style; how much of that layout/flow do you get 'for free' when developing for WP? And... how did you get Nokia to hand you a Lumia?