At least it was clean - but they should fire everyone at the front desk
I flew into Philadelphia as part of a wedding party. I notified the front desk I would be arriving later in the evening. Another group in the wedding party dropped off some of my belongings at the front desk for me to retrieve prior to my arrival. When I got there, first, nobody knew anything about my belongings. We finally found someone who knew what was going on there. 
Then, Girard, at the desk, tried overcharging my debit card for the initial authorization. This had the effect of shutting off the card, as it exceeded the single purchase limit I've placed on that card. So, at midnight on a Friday night, after he screwed up, this guy stared blankly at me, offering no suggestions, advice, or assistance of any kind, until another person in the wedding party stepped in and put the authorization on his card.
I'd reserved a room with two queen beds. I got two double beds. This wasn't because there were no rooms with two double beds, though. I know this because the person whose card had to be used for my room had reserved a room with a king and sleeper sofa, which he wasn't given. Instead, he was put in a room with two queen beds. Due to the hustle of being in a wedding, I didn't bring this to the desk's attention until I checked out on Monday. They tried giving several excuses, all of which amounted to it being my fault because I didn't report this earlier. Then, they offered $10 per night off my stay.
This was just my room. They also emptied the bride's belongings out of her suite, because someone erroneously thought she was checking out 24 hours before she had booked. Girard was at the desk at midnight that night, the night of the wedding. First, he claimed her things were removed so the suite could be cleaned. It wasn't cleaned. Then, he located everything in the lost and found. This was on her wedding night. Nice.
Other people were informed when they arrived that there was no room reserved for them, even though they had made the reservation. 
Monday morning, when it was time to catch my plane, I had straightened the locked debit card out with my bank and went to the front desk. First there was the conversation attempting to blame me for being put in the wrong room. Then, I gave them my card, they swiped it through their register and printed me a receipt.
After arriving home, I realized they had charged my friend's card, the one used for the initial authorization, instead of mine. Over the past month, we've gone round and round with them. Finally, my friend just had his card issuer decline the payment on his card, and I'm working on speaking to someone to straighten this out.
I expect a much higher quality of service from a place bearing the name "Marriott." This is frustrating and disappointing, and I still have to deal with a bill they messed up.