Our two day stay in Sevilla was awesome due to Pilar Y Alberto's place being close to everything that we wanted to do. The Hop on Hop off bus stop 10 is just a quick 5 minute walk and even walking down to the Cathedral took only 15 minutes. Our host were very easy to communicate to and very helpful. The only thing I'd suggest before you get there is to ask for the wifi info. We had to guess which network and the password which we guessed correctly after about an hour.