Right off Admiral Avenue and walking distance to the beach (we didn't need -- it was January) and California Avenue, where all the shops are. Free bus to the water taxi and a quick easy ride across the water to downtown Seattle. The city has great public transit, so get an Orca card.
The apartment was just the right size for two people. The large closet provided space for all our gear. The kitchen was really nice. We only cooked breakfast there, but we found all we needed to do that. The coffee pot is actually a coffee pot (thanks), not an espresso machine. There were basics in the cupboards, like oil and coffee. The apartment is right over the garage, but the garage door was only operated once, so our host was very thoughtful in avoiding that disturbance. There is no reading lamp by the bed, so bring your headlamp if you're a reader. The bed was wildly comfortable. There were extra blankets and pillows.