Breeze, if the little girl was dropped at your place it would be a whole different story!
Bein in your own house means you can still get things done, your own kids will be at home not someone else's house if they are there. Its always easier in your own home!

If you know you are getting time off at weekends or when the kids are in bed its probably a really good arrangement for you! You will also be also to think of the extra $$ if you're getting stressed out about the "kids everywhere all the time" thing.

Also, my nanny arrangement lasted 2 years before I got over the 24/7 kid thing, so sounds like its definatley something you should give a try at this point, if all goes well with the meeting of the child and parents and it all fits into your world well.