I have heard Finton is a great school, although I can only give you my opinion from experience...
My son started in reception at Dolphin this month, and as a child who is very unsure of new things and would almost always make a fuss at drop off at nursery for 2 years (!), he has settled in amazingly well!
He had 2 or 3 wobbly days going in at the beginning and knowing him I was certain this would go on for weeks, however on day 4 he was brilliant, by the end of the week he was taking himself and enormouse school bag in to the building and downstairs to his classroom happily!
Last week he told me, unprompted, that he LOVED his new school. He has never said that before about nursery, camp etc and I think is a sure sign of how good the teachers are at encouraging and nurturing the children, creating a safe, interesting and stimulating environment and just showing real kindness!
We are not a religious family and I am nothing but impressed with the school and how right it is for my boy.
Good luck!!!