Carlos's place is really unique and it's in a very walkable area. The house has three floors and is connected by a narrow staircase. It would be perfectly comfortable for 2 people but a little small for more. The house is really clean and there's a list of recommended restaurants that are within walking distance which is a nice guide. The kitchen is pretty small but you should probably eat most of your meals at local tapas bars anyway ;) The street is very quiet so you'll get plenty of rest here. I'd certainly stay here again in Sevilla!