I can't speak to the check in process as my family were the ones that checked in before I arrived.
Alex was responsive by messages.
The location was great, however the place was a bit smaller than I expected/that appeared on the pictures. The kitchen was very small so if you plan on cooking you will have to get creative. The balcony was great and spacious! The place lacked some amenities like dishwasher soap/detergent, shampoo/conditioner in the bathrooms, and adequate amount of toilet paper, but there is a store across the street that made purchasing these easy.
The only real issue we experienced was that the AC would turn off after 30min-1hr. Which in late August is a problem as it tends to get very hot.
I messaged the host about it a few times who said they will send a technician but I'm not sure anyone ever came, as the issue was never fixed and persisted.
Central location where you can walk to most sights - we walked everywhere.