O.k. Stay in a Terrible Neighborhood
This hotel is in the worst part of San Francisco...so be ready for that (I wasn't). There are food banks near and the homeless/mentally unsound flock here. We felt very unsafe. We took taxis back and didn't go out at night because the area was super sketchy. The hotel room was nice and spacious/clean, but other factors really made our stay below average.
First off, it took them 30 (yes 30) minutes to swipe our credit card at check in. They said their system was "lagging". We ended up making a run to a nearby convenient store to pass the time. When we came back, they still weren't done running the card so that we could check in. It was late, we were tired, and it was a terrible start to our stay.
On top of this, they are "very slow" this time of year--as they informed us, yet they didn't bother to shut down the floor when they started construction at 8 in the morning. Why not place guests on a floor where construction isn't happening? Luckily, we were on Mountain time so we were up early, but we felt terrible for the people who had rooms right next door to the construction. We ended up leaving early that morning because it was so loud and obnoxious. 
Overall, I would avoid Cova next time. They have some work to do on service. I would have given them 4 stars, even with the bad neighborhood, but they dropped the ball.