We spent three weeks here and loved it. Location is spectacular: in the first block by the river (which you can see from the front window), on a small (and quiet) public square, on the edge of a quiet family-friendly neighborhood. It's literally next door to the regional HQ of the Guardia Civil (Spain's militarized national police), so probably the safest place in the whole city. :-) It's a five minute walk across the river to the edge of downtown, and about 20 minutes' walk to the Old Town where the nightlife is liveliest.
The unit's architecturally interesting. It's in an old building whose wooden beams and brick walls have been emphasized in a recent remodel. Very modern and nice kitchen, and even a clothes dryer, which is rare in Spanish flats. Disposable stuff like the cookware and bedding weren't quite as nice, but they worked.
The unit was super clean and the hosts extremely responsive, both much better than the average for AirBNB.
Caveat for those sensitive to cigarette smoke: the unit's right above a neighborhood bar popular with the cops stationed next door. Like all bars in Spain it directs smokers to stand outside -- under the unit's main window. We hate smoke, and this wouldn't keep us from staying there again, but you could find a less smoky place if that's your top priority. Maybe over a dentist's office. :-)