And that doesn't even begin to factor in the value you can get out of hotel stays with fifth night free, for example. (onemileatatime.boardingarea.com)
Also, did you know that when you stay at any Marriott for four award nights in a row, you get a bonus fifth night free? (cardsfortravel.com)
However, fifth night free redemptions are only valid for properties in Category 3 onwards. (raytravelsfree.com)