Thought I would add this tid-bit. I called our hotel in Paris received through PL and was told that PL guests ONLY receive rooms with two twin beds. If I wanted something better, it was EUR45/nt extra.
I normally call ahead and make my requests, non-smoking and a king bed. I also note with whom I spoke to, as often times they end up being on duty when we arrive. However, I am not sure that this does the trick for us as much as checking-in late does. We have consistently been given better rooms because the not-so-good ones were already assigned earlier in the day.