I have said this in my head many times, largely because I'm kind of picky and have high (probably unrealistic) expectations. But, I recently came across a business I can safely proclaim I will NEVER use their services again.
My husband surprised me for Christmas by arranging for a deep-clean of the house while we were out of town. I am actually pretty good at keeping up with tidying, up and general surface cleaning, but not so much the deep cleaning, so this was a great gift! Or, it was supposed to be. We got home, and I was underwhelmed. The house just didn't feel or look CLEAN. I thought I was maybe being too picky (after all, I had no input in the decision, and was unsure what expectations my husband laid out), but then he walked in, and was also disappointed.
Some of the items left undone:
Furniture was only partially dusted (the left half of the china cabinet was dusted, the right was not)
Our beds do not have bedskirts, and sit up high. They did not even attempt sweeping under the beds.
There was a leaf in the middle of the living room floor. The area rug was vacuumed, but the wood floor was not swept.
The light fixtures had cobwebs hanging from them.
My husband looked over the original agreement, highlighted the requested services that were not completed satisfactorily, and contacted the company. The company apologized and arranged for a second visit to correct the issues. They came yesterday, and the work was better, but not thorough. They will not get a third chance, and we will recommend against them to anyone we know looking for a cleaning service.
FWIW, we have had a different cleaning service in the past. We had other complaints about them (smoking on our property, breaking items while cleaning without telling us), but the house was always spotless. So I felt I had a reasonable expectation of level of cleanliness.