Covered in Ants! Worse experience ever..
What is worse than a delayed flight that ultimately gets cancelled at 10:30pm... Than getting a voucher to a Marriott hotel that doesn't have any rooms.. To find out the airlines desk that booked the room doesn't reopen till 4am.... To then be shuttled across town to another Marriott that wouldn't take the voucher and finally did (with a little coaxing of how to process a direct bill via 45min later -- and I wasn't even a Marriott employee) to then put a sleeping child in bed without turning on the lights (which I know better than to crawl into a hotel bed without checking) to wake up 1.5 hours later covered in ants! 
.... Let's just say I jumped up swiping ants off my daughter and pulling her out of bed to put her in the shower to step on a carpet full of crickets! Then when I complained to the night manager, I get a "your waisting my time sorry" response -- like it was an imposition for him to even listen to me. My daughter and I have ant bites from head to toe and itch all over.
I have been a Marriott brand lover for over 10 years and I have never been so disappointed and disgusted in my life! If this is how the night managers are trained by Marriott to treat all their "weary" travelers, then I will never stay in another Marriott again. In fact, I will never stay at this one again.