Having earned over 500K in CP points, I have stayed in a lot of CP properties. As an industrial consultant, there are a lot more of these properties located close to my work than there are Hilton's or Marriott's.

What folks have said above are all true. The inconsistencies within the brands are incredible. There are great Comfort Suites and there are bad ones. Same is true for Comfort Inns (different than CS). I have not found a good Quality, Rodeway, or Econo Lodge and I generally avoid these.

Some Clarions do not have free breakfast (Williamsburg, IA for example) and while this is supposed to be the upscale brand, they generally are only as good a Comfort Suites usually.

The MainStay and Cambria are good entry level suites style (as in extended stay suites). I can not say about the Suburban as I have not stayed there.

Because of bad experiences in a few locations, I have been looking for Hampton Inns and Hilton Garden as I find the to be more consistent and more expensive, and often less convenient.

I generally avoid Best Western as the variability within the brand is much greater than within individual brand at other chains. There are many good ones though and a little research may turn up some gems, particularly in out of the way places (Paradise, PA main building is a good example).