I've not had a nanny here in Qatar MM but I have friends who have had both live in maids/nannies,under their sponsorship,and the 9-5 types who were under another's. Personally I prefer the one's who don't live in as that can be a bit of an issue in terms of privacy.And also since as a mom we have that whole natural jealousy bit and wouldn't want our kid been too attached to the nanny where the baby would only find solace when she's around. And this tends to happen when its a live in. And again its better they are independant from you  as far as the visa goes. Less hassle specially if God forbid they turn out to be in anyway trouble makers and law breakers. One of my friends wen't through hell cos her live in maid ran away with her boyfriend,who it turned out was the reason why her folks sent her to Qatar cos he was of bad character(he followed her here), and was caught with him by the cops.She was so haunted by it all she vowed never to get young maids again!