Hidden Bookshelf Door

Has anyone tried building anything like this?

http://www.hiddenpassages.com/woodfold.shtml

or

http://www.hiddenpassages.com/builder_doors.shtml

Im thinking of if I should just order from them, or of this would be pretty easy to do? Based on my situation, this type of bookshelf would make the most sense for me.

Pretty cool. I have seen these. But you'd have to disguise the middle hinge and look at the floor to shelf ratio, there's a slight gap down there, thieves can be pretty dumb but not anyone else. Add some 1/8" trim to the bottom with a tiny gap.and maybe place a chair on one side or some sort of side table with a lamp to disguise the overall impact of it. And a few books on the floor might help also. Basically, if I had the mean to install one of these I would make it as boring as I could so that no one would give it a second glance.