I was disappointed by several different things.
The biggest deal was that the apartment had not been properly cleaned. Almost the entire stock of plates, glasses, silverware was sitting in the dishwasher uncleaned. Several plates had dried encrusted food. There wasn't a single clean glass to drink from.
Clear instructions were not provided for how to open the lockbox. I've never dealt with a lockbox before. It wasn't intuitively clear what to do after entering the combination. There seemed to be a tab you had to slide to open the lockbox. But it wouldn't move after entering the combination. I eventually opened it when I accidentally pressed the tab while trying to slide it. By then I was thoroughly soaked in the rain.
The instructions sheet with WiFi directions and house rules was left sitting on top of the fridge. There was just very poor attention to detail in many different ways.
On the second day, both our keys just stopped working in the door that opens onto the street. Both of us tried several times, and we couldn't get the door to unlock. The host insists we must have tried the wrong key. But we did, of course, try both keys, and did so over and over again. No idea what happened, because the keys had both worked the first time (when we both arrived separately).
No toilet brush in the toilet was a biggie for me.
On the plus side, Ellie responded immediately both times I had to message late at night.