All four of my children go to a CM two days a week, although she is flexible enough to swap days or do extra days for me. Two go for the whole day and two just before/after school.
We chose her because we knew her as an acquaintance already and knew she had a good reputation as a minder.
It's reasonable cost and is convenient - close to the children's nursery and school and close to DH's work.
She and her assistant (her grown up daughter) are very loving and affectionate to the children they mind and the children (not just mine) all seem to love them. There is a mix of different children of different ages throughout the day (ie before and after school) or depending which days they go, so they have regular friends they see but there is variety. The minder also has lots of her own children (all teens and early twenties now) who are also fab with the children.
The CM and her assistant take the children to toddler/playgroups, the park, swimming, the aquarium, library, soft play etc. They also do baking and craft activities at the house and generally have a great time.
The CM will provide food if we want, or we can send packed lunches. I send my little twins with a changing bag and a packed lunch.
They bring home their Early Years Learning Journey folder every few months that are full of pictures and info about their development.
I think if you get a good CM you can't go wrong really - it's a lovely home setting for the child, but with all the stuff you get at nursery and more.