We stayed at Mark's place for 5 nights. Although, Mark's place was cheaper than most decent hotel rooms and was in a great location, there were a couple things that had us thinking that we might have been better off with a hotel room or a different Airbnb.
One of the biggest issues was that the door to the condo did not lock. The door used a key card entry, but you did not even need a key card to open the door. We let our host know, but we didn't hear back for a while, so we just took our valuables with us when we went out. They finally responded that they would send a maintenance person later that day. We arrived back that night and the door was not fixed. The next day we took our valuables with us again, but this time when we came back, the door was locked but none of our keys worked, so we texted and called the host. He picked up this time and told us to go to the front desk and ask them to re-program our key cards. We went to the front desk and said that we needed our keys programmed for 505. They happily complied without asking for any verification that we were indeed the individuals living in 505. After we opened the door, the door stopped locking again. This was very unnerving and so we just ended up bringing our valuables to store elsewhere as this room was not very safe.
A couple other things we ran into was a small leak in the kitchen sink and an issue with the air conditioner. It would turn off after a certain time, and so every time we woke up in the morning it would be very stuffy in the room.
On a positive note, there are a lot of beach gear that the Airbnb provided such as floating tubes, snorkel gear, umbrellas, and beach mat. This was great since we did not bring these items with us and were planning on renting them. Also this place was a great location! We were able to walk to many different areas and there's a lot of good food around.
Overall we think this place has a great location, but we don't think it is the safest place to be at, and the host is not very responsive.