Has anyone actually had an Au Pair? Looking for some feedback.

I think this is the best thing for us, I need an extra pair of hands, someone to babysit occassionally and give us some couple time, and some one on one time with DD1 that she is sorely needing at the moment. Financially this seems the best option - we have the space and an extra plate at meals is hardly taxing! lol

So basically just looking for some real experiences, not the glossy photos on the website