Don't under estimate how easy / difficult it is to drop her off / collect her. I know people will come along with 'worthy' things to ask / look for, but on your way to / home from work, those things will make life really challenging. So - parking, distance, the fact it is on the way to work against 5mins in the other direction (which is 10 in rush hour and then 15mins to get back to your starting point).
Cost is obviously important. Remember to look at the overall cost for the year, rather than 'just' the daily rate. Sometimes a nursery has a lower daily rate but then asks to you pay for other things on top, or provide things that the other Nursery might include.
Are they open all the time you will need them ? - do they open early enough / close late enough / and, if you have to work between Christmas and New Year, are they open then ?
Ask to see the menu. Is food cooked on the premises? Do they have a cook, or are the childcare staff expected to do it? (If you feel strongly about this - it bothers some more than others - do they have dinner with veg etc., or is it all a bit 'out the freezer and on to the baking tray'?)
Where / how do they sleep ?
[Remember she won't be a tiny baby for ever - this is quite hard when she is so little]
What outside space have they got ? How do they use it ? Can the children go in and out as they like or do they just go out at 'play time'?
Do they take them out and about in the local area ? How does that work ?
How do they communicate with parents / and you with them. Home / Nursery diaries or electronic systems ?
How does settling in work ?