Pros: Greg was really communicative, helpful, and accommodating leading up to and throughout our stay, and the location in Fremont is excellent - just a few blocks from the Stuff, in either direction. The apartment was bright on sunny days and the blackout curtains in the bedroom cut out most of the street lights (there were no blackout curtains for anyone sleeping on the couch, though). There's a small closet with a few hangers, which is handy for longer stays and shelves just outside the bedroom where you can unpack some clothes. The lamps, pillows and artwork made it feel much more comfortable/homey than your average sterile investment-property Airbnbs. The apartment was very clean and basically comfortable, aside from the below:
Cons: Temperature: there was no central climate control while we were there, so there was a large unit taking up valuable space in the tiny living room. Not a huge deal if you're only 2 people, but for 3+ it was in the way. It was also complicated to operate and we were cold most of the time. We used a space heater in the bedroom, but couldn't leave it on when we were out so it was cold for a while when we got back.
Noise: If you have someone staying on the couch, they have to walk through the bedroom to get to the bathroom and the door squeaks really loudly - at least in cold weather. Greg provides earplugs for the street noise, but we didn't find the cars going by to be a problem (no honking or anything). We did notice though that you could hear everything the neighbors said, when speaking in normal voices. It wasn't loud, but if they ever decided to listen to music or have people over at night, it could be intrusive.
Also, while we were there, a number of the blinds were broken - something to check on if you want to be able to raise and lower them for light or privacy.