I agree with you Richard, as a painting contractor for very many years, people are always looking to get more and more out of you. I had to give an estimate to a lady a few weeks ago who had more stuff around her home than a thrift store including heavy furniture, stuff all over the floor and junk everywhere. I knew if I accepted the job id be a furniture mover and cleaner. I also agree this article makes it seem like the contractor is out to rip off the customers. Fact is I always leave doing more work than agreed upon. It doesn't bother me since the customer is always satisfied. Just saying
As you walk through your lighted rooms (preferably day light) see if the new coat has light spots showing the precious paint. This is call "bleeding through". This means that there's only one coat of paint or the paint was diluted or the trasition of colors were from light to dark (or the other way around) and primer was not use or the painter is inexperienced.
Maybe you've just moved into a new home, and you haven't got around to buying brushes and rollers yet. Perhaps you're worried that your brush-skills aren't that good, and you won't achieve that professional-looking finish that you’re really going for. Handy professionals will turn up with everything they need to get the job done, from ladders and brushes, to rollers and tarps. You just have to provide the interior paint and primer!