that way you dont need to drill or glue anything to your dash,
and i dont like the a\c adapters, its not always stay steady and of course block the a\c.
edit:
there is another option, using the cigarette lighter like the griffin roadtrip: http://www.griffintechnology.com/products/roadtrip
HR also have solutions like that.
but its too low for me and again not always stable.
I used a brodit mount from proclip in my TSX. It has a passthrough connection that integrates to my dice integration...It is also adjustable to fit different cases.