We had a great time in Sevilla staying at Miguel's apartment. The neighbourhood is great - lots of small restaurants and bars all around, and it feels like a local area rather than touristy. We mostly walked as it was an easy walk into the centre, but a couple of times we used a bus to return to the apartment - the bus stop is very nearby.
The apartment is arty and quirky, and well appointed with everything you might need. Miguel allowed us to leave our bags at the apartment before the check-in time as we arrived early in Sevilla - this was much appreciated.
Overall it was a great stay and the apartment was just right for our needs. Just a couple of small issues we encountered: there was quite a lot of noise from a neighbouring apartment (but I suspect this might be the case in much of Sevilla). Also we could only get the shower to do cold or boiling hot, with nothing in between.