This is a great space for a large group to be together. We stayed there for a 30th reunion of friends from grad school. It easily accommodated 13 of us including several kids in their teens and twenties.
The host met me at the place and showed me all the special touches -- the music system is awesome as is the TV and I love all the creative ways they've used reclaimed wood or unique items to decorate. He was also very responsive to us -- even on a holiday weekend -- and got back to me quickly whenever I had a question. He also gave us some great recommendations for local shops and restaurants that were much appreciated.
There are plenty of sleeping spaces and the beds were comfortable. Be aware, though, that only two of the rooms is suitable for couples to sleep together (vs. single beds) and that the master bedroom is above and open to the living room so whoever sleeps there should have ear plugs or be prepared to stay up if others are still hanging out in the downstairs living room.
The kitchen is well equipped with spices, a toaster oven and microwave, two dish washers and a good sized stove plus a great array of cookware and dishes. There's plenty of space for chopping and prepping. Has a big fridge with filtered water and they stocked it with several bags of ice, which was awesome. We love to cook together so there was a lot of activity in that space and the large kitchen island with stools is ideal for this. They do need to fix/upgrade the dishwashers as both had some issues though made it through our stay.
We loved the way the kitchen and living room spaces are open to each other -- ideal for being together while having different things going on. At any given time, we had a board game going on at the table next to the kitchen, table shuffleboard competitions (loved this feature!) and folks sitting in the living room visiting while others were cooking.
Since it rained a lot while we were there and was a bit chilly, we didn't use the outdoor space and grill but would have loved to under different circumstances. The side wall of the living room being a garage door is a very cool feature and would make that an amazing way to have a group together inside and out. On the two evenings that it didn't rain, the older kids liked going out to the little deck up the metal stairs (they dubbed it the "treehouse") to talk and hang out away from the older folks.
The location is great -- close to the Gaslamp district, Balboa Park (we walked there one day during a break in the weather) and also an easy drive to Coronado Island and other beach areas. Lots of great Mexican restaurants nearby and plenty of street parking. The one garage spot was great to have as well.
Overall, we had a great stay and I'd recommend this as a great space for larger groups!