Nice one room appartment with separate bathroom. Clean and comfortable. It's located an easy 20 min walk from the San Diego Convention Center and a 10-15 min walk from the Gaslamp Quarter. It is set in the middle of an area that is mostly office blocks, so it gets very quiet at night. Since I was on my own, I took a taxi back in the evenings.
There's a deli around the block and it's an easy walk to the trams and such. Airport is no more than 15 min away by taxi/uber.