My experience was at Kings in 2008, and it was a 4 day stay.
Everything was cleaned well - it was impossible to keep clean permanently because there were frankly a lot of visitors' shoes coming in and out, and there's not really much that could be done about that. I suppose cleaning in the evening rather than the morning would help.
The food was awful. I felt really bad because there was a large Caribbean contingent in the hospital and they, rightly, had food catered specifically for them so there wasn't so much of a culture shock. The problem was, the funding of that was specifically for that, so I couldn't choose from that menu because it was race specific, so I sat in a room with glorious smells of spiced food while eating my puddle of grey.
My experience was also of the hot, crowded room, but... the thing that made it OK was the brilliance of the staff. Though they were probably as understaffed as anyone, we benefited from having a ward sister (several, in fact), who took nonsense from no-one. Visitors were evicted at 9, including the one family who appeared to want to stay long into the night. That particular family were also encouraged to separate so that some could walk around the grounds, and others could stay, then turn about. So the crowd of 5 was down to 2 or 3 most of the time. Phones were forbidden after 9 too. The lights went off at 10 in all the rooms. If anyone wanted lights, they could only use the above bed lights.
I had an absolutely panic on the first night. DS had been sleepy all day, then woke up ravenous and I didn't really know what to do so just started pacing in the corridor, hoping. I hadn't slept in about 46 hours or so, and they found me, popped me back to bed, showed me how to do a sleeping latch, assured me they'd keep an eye, then came back regularly to check I was OK. It meant I was calm and the others could sleep. Yes, babies woke up randomly to feed, but again, there's not much can be done about that.
I have long standing depression which was in my notes. One of the midwives took me aside, away from DH, to gently ask whether I was OK, whether I knew what services were available with or without DHs knowledge. As it happens, DH is brilliant about my mental health problems, but I valued the fact that they didn't know that, and made sure I was safe and comfortable in case he was a problem.
These were the days before the fathers were allowed to stay, so I don't know how things would be for them now, but it was a difficult, exhausted experience made bearable by some brilliant nurses who were very much in command of the ward to make sure nobody was behaving selfishly.