We had a wonderful stay at this Mission Beach cottage! The location was perfect, right between the quiet bay and the more active beach boardwalk. It was nice to be able to walk to the boardwalk in a minute flat and have access to restaurants and shops. The bay boardwalk was peaceful and quiet, and we enjoyed that too. We did not have a rental car (but did have friends who chauffeured us places a couple of days). While we could easily walk to the grocery store, CVS, and many shops and restaurants on the boardwalk and on the main road the house was off of, we would recommend renting a car to get around to anywhere a little further away. Uber would work too, but overall to just do some general cruising and stopping at random spots around San Diego, I think a rental car is a good idea for a trip like this exploring San Diego.
Our only issues were that the bed was not very comfortable, and since the bedroom was so small ("cozy", I'd say :) ) , we had to store our luggage in the living room. This wasn't a huge deal, but they could reshuffle some things to make luggage and clothing storage easier since it is a small place overall.
The most important thing for me when traveling is to sleep and shower in a clean place, otherwise I can't feel refreshed and ready for the next day. This place was super clean, and the decor was cute and refreshing. The front porch was cute and nice to have morning coffee out there overlooking the bay (which I walked in the mornings too), and back patio was nice and private, with bikes to use (we never even got around to using them though!). The place had both bath towels and beach towels for use, and plenty of toilet paper (not a given with all rentals!). It was nice having the washer/dryer (which I had no intention of using) when both my husband and I got "lucky" enough to get pooped on by seagulls while out on a fishing boat! Washer/dryer worked great. The hosts were super responsive to the question or two that came up during our stay, and our stay went off without a hitch.
Would definitely recommend this place and stay again...but wouldn't mind a new mattress :)