Everything was good, except for a few minor things.
The owner of the apartment was very helpful in all things I needed and reacted quickly. She did a great job. For example she asked when I would usually like to get up and brought the breakfast to the door a few minutes before that, and also adapted the drink to my wishes. Also she was great to chat with.
The room has everything I needed as well. Even a mini fridge and a well working air conditioner. Also it has many lighting options, and a few plants. Although the plants could use a little bit more care, I guess. Maybe they were not treated well by previous guests. The air conditioner and TV are all Chinese, so you will either have to guess a lot or learn some basic Chinese, or ask the helpful owner how to set them up according to your wishes.
The bathroom is looking great and it is clean. Fresh towels and other necessities are provided. Everything looked fresh and clean actually. The only minor things that appeared to me in the bathroom are that the toilet smelled a little. After mentioning it, the owner quickly solved the issue, so the problem no longer existed.
The view from up there was also great, at day and at night. It seems Chengdu never really sleeps. Sometimes one could hear some car blare, even though this apartment was so far up, but it was not too loud and did not impact my sleep, so it was fine.
The location could not be much better than it is. When you exit the nearby metro station at exit C, you are almost falling into the building, where the apartment is.
I wish I could have spent more time in this apartment and gotten to know the cats. I had a great stay.