Marriott International, Inc. Reviews 

Booked with them for a stay in Puglia for my parents’ 50th wedding anniversary. A luxury stay it was not- broken stove, broken dishwasher, broken showers, person checking us in was an hour and a half late… zero support from Marriott. Basically, this is a scam and you’re renting dodgy properties from independent companies. Marriott’s name should be a guarantee of quality and support and instead they wipe your hands of you.

I booked an apartment in London through Marriott Homes & Villas in September 2021. They charged my card. But 21 days before arrival, I hadn't received the contact information, apartment address, etc.
I reached out to the Marriott partner managing the reservation. After 2 emails, they said I didn't have a place to stay because they never got the reservation (but they clearly had my money). Marriott Homes and Villas did NOTHING. It took them 5 days to respond to my emails.
How I finally got a response was a nasty tweet about it to Marriott Bonvoy. Over the next 3 days, they told me they'd refund my money, then sent me an email saying I wouldn't get a refund because my reservation had been canceled less than 30 days before arrival. Then said they world refund my money and honor the nights stayed and points if I booked somewhere else.
When I inquired on how to do that, I was told (by the same person in the same thread) that they wouldn't even be giving me the points and nights. I finally got some one (after 5 phones calls, 10 emails, 2 tweets and several DMs) to give them the Elite Customer Service phone number, where after being told again, "No", and asking to speak to a manager, managed to at least get the nights credited and points. Never did they offer to actually help me with the problem they created. They gave me a link to another booking site that was questionable. Never did they offer to put my family up in a Marriott hotel. Basically, I got a bunch of useless points (40,000 isn't even enough to get a free night in any of the Marriott brands hotels) and some nights which might get me status if I ever stay at a Marriott again.
After I sent two emails to the VP of Loyalty, they finally agreed to pay the difference in price between what I booked with them and what I paid the other site. They included what looked like the body of an email (no header like all the other emails in the chain) they claim they sent where they requested the receipt for refund of the difference. Never before that final email had they offered to reimburse me the difference.