The apartment is part of the house with a locked door between, and has a separate entrance through the garage area so it was completely private. Sensibly chosen key codes and motion-activated lighting made going in and out very secure and easy: no fighting with lock boxes in the dark!
The apartment is bright, clean and stylish with a bedroom with a door leading to a cute little patio and plenty of closet space for clothes etc. The living room has an easy-to-unfold and comfortable sleeper sofa - but be aware it's a twin mattress only (which was fine for us). The kitchen area is minimal but has essentials for making tea or heating leftovers and even had a small dishwasher making it easy to clean up after ourselves.
There's a TV and wifi but for those who care or expect it, the TV doesn't have Netflix and isn't wifi-enabled, and the wifi wasn't super speedy. This was not a huge deal for us.
Some sound from upstairs could be heard, but it was only during the day when we were awake anyway so it didn't disturb us in the least although a very light sleeper who likes to sleep late might choose to wear earplugs.
Terry came down to meet us the day we arrived and checked in with us during our stay to make sure we had everything we needed, and responded super quickly when we had questions.
I chose this as it was close to family that I was visiting, and the location worked out perfectly and was convenient for a lot of what we did. There are some really good coffee shops within a mile, as well as a donation-based yoga studio, supermarkets, restaurants and so on. The Bart station isn't super close if you're dragging suitcases to the airport, but it's an easy walk if you need it.
All-in-all I'd recommend Terry's place; it's perfect for a couple or three people.