I do three days a week, it pays very well and it looks good on my cv. But...I HATE it. I don't like the work and I don't like my boss, the whole atmosphere is getting me down. I don't think it is worth disrupting my family life for, all of a sudden life is hectic, there is no time for anything. All for a job that I don't even like.
But in the current climate, after a few years of not working would it be incredibly stupid to walk out? I don't need to do it for the money, my DH has a reasonably paid job and we have relatively low living costs (no mortgage).
But I do think I will have a problem resurrecting any kind of career if I don't stick this out.