Location is ideal - it's away from the hustling and bustling of both Pasadena and LA, but close enough to get there in minutes. The house is quaint, decorated with a lot of personal touches. There is some traffic noise since the house is located on a semi-busy street. We stayed at their guest suite and owner installed a water fountain to try to cancel the noise out, and to create ambiance. However, if running water keeps you up at night, then the guest suite probably is not ideal. Also note that the guest suite has a double bed, so pretty tight for a couple.
It was wonderful to smell coffee in the morning from the owner, whose kitchen is right next to the guest suite. Some minor noise from the kitchen was also experienced.
All in all, owner is very communicative and great host.