I agree, see how you feel when you leave. I never knew what to look for and when I left our current nursery after the tour I just knew. We went with a bright horizons but my youngest is moving to a monkey puzzle in January as we are moving. Bright horizons were amazing, absolutely love them! I’ve also heard such good things about money puzzle so I hopefully one feels good for you x
I think it is most important to go with how you feel after having visited the nurseries. Which one did you feel most comfortable in, or which one was it easiest to imagine your baby in. All nurseries follow the same legislation and have to adhere to the same guidelines (here, not said that, therefore, all nurseries are good/bad). Monkey Puzzle and Bright Horizons have serval nurseries, and tho it can be the same chain you might like one over the other.