I do think you're right @Quisquam that you need to be alert when looking at care homes and 'present' with visits etc., It does give you a better feel for a place and staff know you're on the ball (and that you will also support them if they need back up with social service etc)
In my mum's case we chose a 'needs improvement' care home over a 'good' care home which seems insane.
However, the residents in the 'good' care home seemed very quiet compared to those in the 'needs improvement' - too quiet for adults who had dementia and other needs.
There was a lot of laughter in the 'needs improvement' home when we went. We were encouraged to have a chat with the residents whilst the person showing us round went off to get us a cup of tea - so no fear of what we may find out. The 'good' home rushed us through at each point.
And the 'needs improvement' home we chose felt 'home like'. The residents ate in one shift (the 'good' care home had a rota which mum wouldn't have understood - she had dementia). They had a lovely conservatory dining room overlooking the garden with a menu in big letters outside it and we were encouraged to book a meal with mum (obviously we paid for that) whenever we wanted.
We had regular phone calls if mum had been unwell or if she'd had a fall - even if there was no need for an ambulance to be called they kept us informed.
When we went she was always clean and tidy. One of the care home staff always painted the ladies nails for them if they wanted it. He would also set their hair in between hairdresser visits which mum loved!
Most telling from my point of view was that mum had gone there from respite in another home. At that respite home (which had a good reputation locally) mum had been put into incontinence pants because of a few accidents - double incontinence was on her notes from them to the final care home. She was also on a zimmer frame. Both of which she hadn't been using when she went from a long hospital stay to that respite home.
At the 'needs improvement' place they reassessed her and told us they were keeping the pants but only as a precaution as she was a slow walker. She was perfectly capable of using the loo and they'd seen no double incontinence at all. Until she finally died in hospital from a chest infection the staff said they'd never needed to changed her pants. They were as dry coming off at night as they were going on, like normal pants. And my mum was a 'cup of tea whenever it's offered' person so was always on the loo!
And they did an assessment on her walking when she arrived. They decided the zimmer frame was going and got her back to using a walking stick. In their words the frame was totally unnecessary, was holding her back and she couldn't use it properly so hated it. They said to us they had no idea what possessed the respite home to get her on it in the first place - her walking was fine, slow but steady with her stick. The difference, to me, was that the respite home had lino flooring - the care home had carpet so more 'grippy'. She never used a zimmer frame or anything other than her walking stick from that day until she went into hospital for her final few weeks.
So you do wonder who all these things are useful for.
Oh and the 'needs improvement' rating? The care home manager was newly promoted so had forgotten some paper work to the inspectors when she'd had an accident case and a death at the home. She'd also had a member of staff 'lose' some medicine cabinet keys (found in a residents bedroom) - which is obviously very bad from a safeguarding point of view.
However, the paper work had gone to the proper authorities (council, social services etc) but she'd left the inspectors out of the loop. The care home put an experienced manager in as mentor. By the time we got mum in there the mentor was phone based only as the new manager had found their feet. She had put in new policies around medicine cabinet use and paper work was being done properly. Their next inspector visit (after mum joined them) got them a 'good'.
So yes, you do have to trust your gut, read the reports and show your face.