IMHO JWs are the best value by far when it comes to using points. Not just within the Marriott chain--but across others as well.

Redemption levels are reasonable--but you get MUCH nicer accomodations than you would get at a regular Marriott (or Hilton).

We have had spectacular experiences in JWs--most notably Rio, Shangai, Phuket, Bangkok, Hong Kong, Capri (unfortunately no longer a JW), Costa Rica, San Antonio and Scottsdale....