1) Cleanliness - trash not taken out, old food in fridge, old vegetables and fruits attracting bugs.
2) No one available to help check in or fix issues.
For the record these are both my fault, but the lack of a host caused a lot of trouble during my stay.
I was informed the day I arrived that it's a self check in. I arrived later than expected - an hour after check in - and the self check in was closed. I had to find another place to stay that night, which is stressful when you arrive in a foreign country at night.
The third day, I locked myself out by taking the wrong keys (host left another set by the door). There was no one available to help me get back in or even communicate with me to find a locksmith. I had to find one myself to get back in at night. This was also very frustrating.
These are both my fault, but I would expect the host to be available to help deal with these. I wish I had paid an extra $10-20 and got a hotel with AC, no bugs, cleaning, and service.
The apartment is well decorated and stylish.
Location - perfect for sightseeing and shorter trips but very touristic. Food nearby is subpar and overpriced. Would recommend a different neighborhood for stays longer than a week.