From my understanding (although this is all still a trial-period) they do empty trash and bring fresh towels every third day. Also they do a full cleaning on day 5 and ....maybe on days 9 and 13? There is a trash bin nearby if you want to empty your own trash more often, and you can always call for more towels, etc on any day.
IMO, worth it! When I go in June I intend to ask for it if I am not offered it at check in.
I am glad it is an OFFER and not a FEE-FOR-SERVICE. Makes it a win-win for everyone instead of a lose-lose.