I've been frequenting our promise land for nearly 20 years and on average about 6 times per year but have yet to stay at Cosmo (I've always been an MLife guy). That's about to change as I have a milestone birthday coming up and I've decided on Cosmo! I curious to know if there's a difference or advantage either way of booking with Cosmo directly or via Marriott. I am a Marriott Rewards Gold member if that makes a difference. Any info is greatly appreciated.