I had a short stay in Katherine's apartment during a business trip. The apartment was quite nice in a very quaint area in Sunnyvale, and I enjoyed my stay. Access to Caltrain was key for me as I had to go to San Jose daily, and it was a nice 10-minute walk from the apartment to the Sunnyvale station. Checking in with a key code was especially convenient for me as I did not know at what time I would arrive. I enjoyed my trip and would recommend Katherine's place for business travelers. Cheers!