Overall the stay is good. The King mattress is very comfortable - the best part of the stay. The location is about 10 minutes walk to the Caltech campus, very convenient. The host is friendly and helpful. The bad part is the very slow wi-fi, which does not even allow a quick check of email. Also, it requires entering 11-digit password everytime when wi-fi is reconnected (which I hated very much). I ended up using my international roaming data in most time of my stay.