My group had a great stay at Jeff's property. We used the upstairs (main unit) and downstairs units during our visit to SD. While the Airbnb did have a very unique layout, we didn't have any issues with these "quirks". I was a little surprised that the master bedroom in the main unit did not have a standard bedroom door as it had a pocket door at the end of the hallway. This wasn't a problem for us but wanted to note this for future renters.
The units were tidy upon our arrival and had sufficient kitchen basics (coffee, seasoning, oil, etc.). Each unit has its own kitchen so it allowed for flexibility in cooking. The two units shared a patio/courtyard that had a picnic table and fire pit with seating. The location was nice and walkable and we had one rental car, which we were able to park on-site.
Overall, it was a nice stay for a larger party. If your group doesn't have a need to access both units by an interior connection, then there shouldn't be any issues for you at this Airbnb.