Larger companies have a good support network. There are more supervisors and more cleaners available so it's less likely that your house would go unserviced due to illness. Unfortunately, larger companies can be less selective in their hiring practices than a small, independent service. Smaller companies have more interpersonal service but you run the risk of getting a dope that thinks "anyone can clean a house". I've only had exposure to corporate janitorial service but one thing that is applicable to both is: CHECK REFERENCES!!!!! Very important. Check the company and then tell them you'd like to meet the person who'd be cleaning your house, and that you require references from them as well.

I'd do it, but I work nude.

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Though I am different from you,
We were born involved in one another.

For it was not into my ear you whispered, but into my heart. It was not my lips you kissed, but my soul.

Complete surrender should not just come at moments in which one faces overwhelming odds, but in the calm when it seems one is personally in complete control of one's life.