In my former job I usually stayed at Marriott Residence Inns and was very satisfied with the properties and the service. In my present job, I stay at Hilton properties about 90% of the time. The quality varies slightly among the different properties, but once again overall I have no complints about the service. I enjoy the Manager's specials in the afternoon at some like the Homewood Suites (often replaces going out to dinner) and the made to order omeletes in the morning and sit down breakfast service are very nice. Diamond status gives you a free breakfast, Gold/Silver sometimes gives you a $10 coupon at some places. I've even had the wait staff accept the coupon for the full price of breakfast. Since I am only Gold at this time but everyone I travel with is Diamond, I usually get the same perks that they get.
Overall I think that if you are staying at Marriott or Hilton properties then you are probably being taken care of pretty well. At least you aren't staying at MOTELS or places with numbers in the name!
USMCFLYR