I used them a few weeks ago. It was actually Wal-Mart delivery service and Door Dash was the company that did it.
It was great in regards to to called before I arrived and my flight was delayed so the pushed it back an hour. There was a little confusion as I had to be there to sign for it and I thought they could just leave it with Bell Service like I done with
Amazon in the past. So they marked to take it to Bell Service. I was at Old Key West so that make it a challenge and I asked if it could be brought to my building. I thought they would drive and she walked which was a little crazy.
Overall it was great. I would just make sure if staying at one of the larger resorts when they call give them your room/building number. Also know that you have to be there and sign for it.