I am a strong believer in gut feeling
But I also asked around
Questions you might think about......
Food - what is provided / when do they eat / if needed anything about allergies or religious or moral dietary restrictions
Other children - who else does she look after
School runs - does the timing fit with your drop off / collections.... what time to they go out / return (ie, is there a lot of sitting in car / waiting around for your little one, on these).
Getting out and about..... how do they travel ? (Walk / car / bus)... what is the situation about car seats? (Does she provide / is it the right size for your child.... or do you have to faff about swapping over every day?)
What groups does she go to ? How often?
Does she take your child to the shops / post office errands etc (I really liked when CMers did this with my dc,as it seems 'home from home' and gets them out and about seeing different things every day, but I have seen posters on here horrified that a CMer might dare to do normal 'parent type things' with their mindees)
If she is one for bigger trips - does that cost extra or all included
Are there animals in the house (and again, some like this, others worry the dog might hurt their dc for example) ?
What other adults are in the house, or might be in the house? Are they all dbs checked? Does she always work alone or is there an asst? Or do any other adults in the house sometimes step in (eg so a baby can remain asleep whilst childminder goes to collect older children on a rainy day)? (Again, this might be seen as positive or negative by different people).
Does she have any rules or routines about TV or other screen time ?
Cost
What she provides / includes in that and what else you need to bring / provide
Communication - how do they 'hand over' / is there a home: Childminder book