Hi,
We have done it twice, once excellent, the other mediocre.
First was some one we knew, and she was brilliant, place was spotless when we returned.
Second, well it was tidy - just. Minor irritations like a mark on the table, a few minor things broken, and small things lost. Nothing to get upset over, just annoying.
We only did it the second time because of a budgie we inherited.
Both times they paid power/phone/water consumed, we paid network connection costs.
Unless we got a known sitter we would prefer to leave the place empty and under the care of a trusted neighbour.
Cheers.