A bit of a mixed bag.
Pros include central location walking distance from most of Sevilla's attractions and prompt communication with the hosts.
The cons are the place is not very clean - dirty floors and dust on the furniture. Also very few amenities. Listing included a photo of a small coffee table, but in actuality there was none. Sitting down for a quick snack/cup of tea was not an option.
Another unexpected surprise was extra fees not mentioned under house rules. I was traveling with my sister and booked the place because it had a bed and a pull out sofa. The hosts were notified in advance that two of us were arriving. However, when I asked Honor for an extra sheet, I was told it would cost us €10 extra.
I would also recommend reading carefully though house rules - they are pretty strict (like being charged €10 for being more than an hour late when checking in without an advance notice - something that's very likely when traveling with Spanish trains/airlines).
Bottom line - if great location is all you are looking for this could be a good option. If you wanted a little more comfort it may be worth looking into other options.