Stayed with a group of 4 (2 couples) for a wedding in Pasadena/LA. Sergio's place was sparkling clean and the space worked well for 4 of us - both bedrooms were spacious and it was nice to have 1.5 baths.
The living room/kitchen area is very serviceable but a little small if you are planning to spend a lot of time in the apartment (we were not). Also note that it is a fairly long 2-mi walk to Old Pasadena where there are a lot of restaurants etc., but it is a quick/cheap ride share (~$6-7 one way).
On the whole, great value and good comfort for a busy weekend.