I was a bit scared at first because I was traveling with my younger sister. I wanted to stay somewhere clean and safe without paying the price. Since you need a key to get to the lobby, I felt a bit reassured.
The building/ elevator is very old and scary looking, but the inside of the room was extremely clean, especially the bathroom. It wasn't as sketchy as I had braced myself for, but I also didn't feel safe leaving my valuables (the room did have a safe though). Ample space for two people. There is no housekeeping service and I did not really interact with the staff, but that was fine because I only stayed for 2 nights.
The location was great-- a five minute walk from the station after taking the Bart straight from the airport. My room was tucked away from the street so I had no problem with traffic noise, but the walls were paper-thin and I could hear doors slamming and people storming around all night.
Two small things that annoyed me: 1. The key card didn't work on the first try so I had to go downstairs to get a new one made and 2. While checking out, I asked if the guy could call a taxi for me, but he refused and told me to get myself an Uber instead. But overall it met my expectations and I would stay here again (can't beat the price).