Hi,
we have an au-paire staying with us. We pay her £250 per month plus english course (£90 per term), plus of course food and board.
She looks after our 16 months old daughter - we do not ask her to do any housework since looking after the baby is already a full time job.
She has one and a half free days a week plus most evenings. We gave her also some paid leave.
I found her through friends - I am not very willing to rely on agencies.
For us it was definetly a very positive experience - but I guess it all depends on the person you get. She is 25, quite an 'old' age fo an au-paire, definetly a positive factor.
I think it is very important also the kind of relationship you establish with her - we have a very informal relationship, but she told me that some of her au-paire friends have a very formal relationship with their house-ladies (so they are called) - if they work an extra half hour they charge it and so on. They are not treated with much warmth at all, and often time they are quite exploite.
I have tried to make feel my au-paire as part of the family, not as an employee, because I believe it makes everybody happier. If she works more (and she does work al lot) she does not ask for more money - on the other hand I am flexible when she has some requests - e.g. some free time to do something she particularly cares about.
I think it is very important to understand why your au-paire is here to work and held her achieve her objectives (e.g. learning the language, learning about a new culture and so on), nto just consider her a cheap way to get help.
She adores my daughter and my daughter adores her.