I am a SAHM and used a nursery for my children 1 day a week of 6 hours from age 1, to enable me to get certain things done that can be very hard with 2 young children (dental hygeinist, sealing a limestone floor, getting a coil put in...you get the drift, nothing exciting or glamorous!)
They both really loved it and I never got tears when I left, nor did they look particularly relieved when I turned up to take them home - they were always happily embroiled and when my son started talking he used to say "just 5 more minutes" and all that kind of stuff.
Fact is I didn't HAVE to send them there so unless they were anything other than happy and settled, I wouldn't have.
The nursery we use is very good, and the staff are very concientious. They are quite intelligent, articulate, and literate as well. They are very affectionate.
The nursery is clean, and "aspirational" in terms of the things they do with the children - its brilliant.
My son is at preschool now which he also loves but he always asks to go in when I collect my daughter, and often wants to stay. They love it. And as I'm not leaving them there 10 hours a day 5 days a week, I really don't feel the need to overthink it - its a fun place to go where I can leave the premises, get some stuff done, and come back 6 hours later to happy, fulfilled and content children. It was a choice I made which I could un-make at any time but there was no need to do so.