We use apartments quite frequently on city breaks and have come to expect certain standards and features.
This apartment was OK, but there were niggles. From a cleanliness point of view, we found long black hairs in the bathroom, and a towel hanging in the shower was stained, so we weren't sure if it was clean or not. Also, items such as an empty box of tissues would indicate that not a lot of care went into the pre-rental clean.
We arrived when it was uncharacteristically cold and wet in Seville, and the apartment was very cold when we got there. I tried to put the heating on, but there were no instructions how to set it, and the day and time were all wrong on the timer. I resolved it by looking at Youtube, but it would have been good to have instructions available.
Similarly, it's fairly standard to have some sort of user guide to an apartment and for there to be a list of local stores/restaurants recommended by the owners. We had none of this, although in their defence I should add that there are many good eateries wihin a few minutes walk.
Towels and bed linen all felt a bit worn out.
The only contact we had with the owners was via e mail or text, which is fine, but it would have been nice to meet somebody at the outset. The keyless entry system, where the door to the building and apartment is opened by an app on a smartphone is pretty neat, but do take the physical keys with you too if you go out, as one one occasion, neither my own, or my wife's phone, would open the building door.
There is a lot of choice of apartment in Seville, as well as some great hotels, so it's a shame that this didn't meet our expectations.