The lower hourly rate is the obvious benefit. The one that actually matters is that the same cleaner comes back. They learn which surfaces mark, where things belong, which cupboard the spare linen is in, and that the guest bathroom only needs doing properly once a month. None of that has to be explained twice.
You get a fixed day and time held for you, so it is not renegotiated every week. If you need to skip a visit, forty-eight hours’ notice and there is no charge.
There is no contract to sign and no minimum term. If it stops working for you, tell us and it stops. A cleaning company that needs to lock you in is compensating for something.