We stayed at the Fremont from June 16th to June 18th. The staff was very nice, the hotel appeared clean...however...
We stayed in room 621, which faces Binion's across the street. There was some slight noise at night from the Street Experience shows, but nothing too jarring. The air conditioner worked fine, the bathroom was small but clean and usable. The room was overall clean, and the housekeeping was very good during our stay.
The only surprise was that on our last morning there, I awoke to find the largest cockroach I have ever seen in my 40 years of living, sitting quite contently on the wall next to the nightstand. It did not move, it just sat there. Because the shutters were closed, it was still a bit dark in the room, and at first, I thought it couldn't be a roach, because I'd never seen one that big. But I recognized the shape, and I knew it had to be a roach. So I got out of bed, opend the shutters, and confirmed my suspicion. I did a quick measurement by comparison, and found that this cockroach was 2 1/2 inches long, and 1 1/4 inches wide. It was really, really big. Finally, my partner killed it with a shoe. I'm just glad that it was our last day there, because I don't think I could've slept one more night in that room.
Again, the hotel is relatively clean, it's just that the cockroach thing really put me off wanting to stay there again. I like the Fremont for gaming, but I don't think I'd stay there again.