Sabrina and family are lovely.
I stayed here during my 2 week orientation at FB. It was great biking 4 minutes to get 'home' or to work instead of dealing with the terrible traffic in the area. Also, even though it was a business expense, I liked supporting a local family instead of funneling money into a corporate hotel chain.
The dogs that a previous reviewer mentioned were not an issue for me, and the place was very clean. Sabrina, her husband, and their son were very sweet. I didn't actually meet them until my second week when I happened to come home when they were playing basketball in the driveway...but that was fine, I appreciated the privacy and being entrusted to use the apartment as if it were my own.
The neighborhood isn't as affluent as Palo Alto and areas on the other side of the 101, but everybody I interacted with was friendly, and I appreciated the character of the place. If you want high-end yuppie, it's probably not the neighborhood for you, but if you enjoy seeing families having barbecues and birthday parties, there's plenty of those going on on the weekends.
I definitely recommend for other FB employees visiting MPK from other offices.