Miguel & Gemma place was a second apartment in Valencia for me, I had stayed there for 9 days. It's really clean, with a lot of facilities have a good location on green and peaceful street a bit aside from city center, 5 min walk from Alameda metro station and 15 min walk to Old City center. I stayed in single room, it was pretty small, but well maintained with everything you need. As for me (personally) the bed is too soft, but sure somebody will find it perfect. There is nothing I didn't like much, maybe just one point in house rules about cooking. I used to have dinner pretty early, at 6-7 pm, but spanish people are about late ones and cooking something serious in my timing officially not allowed.
but in general I really recommend this place, especially for 2-3 days stay. You do the great job, guys, all the best :)