I recently discovered an interesting design pattern for a responsive design. Instead of collapsing the navigation and show it on click/tap, the navigation 'is there' the whole time in the footer and can simply be accessed by using a jump link.
Example: http://contentsmagazine.com (play with the window size).
While I think one big downside of this pattern is the fact that the user can't access the menu at every time, I still love the that solution for it's simplicity.
I am even thinking of implementing something similar in one of the projects I am working on because of the really tight schedule.
But of course, I don't want to slaughter the user experience because I am under pressure, so what do you think – is this pattern alright to use? Can you think of any other downsides here besides the menu access (that shouldn't be too hard to solve, thinking fixed header)?