Go ahead and join. Do not expect a thing other than the points. As a Platinum Level Member for teh past two years and gold before that, I am finished trying to stay in Marriotts. If it works out, okay, no more extra effort. They have not shown me a bit of extra effort.
Yesterday morning, I called the SF Marriott, asked them to please be sure my Plat Level number was posted. Yes, sir, sure, no problem, no prob with an upgrade to conc level.
I checked in, I might as well have been a bag lady. No upgrade, no welcome gift. A crappy room for $255.00 (before energy surcharge, 20% convention tax, and $20.00 breakfast.
I am seriously considering moving down the street.
But yes, join. Expect nothing and you will always be surprised.
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DL PM, UA Plat, Marriott PM, Hyatt Gold