Amanzoe was the best, dedicated kids club, terrific staff and super friendly. All the amans have kids products and go above and beyond with the kids.
At Sveti Stefan they child proofed the room by actually drilling a baby gate into the wall at the stairs. (Definitely the least family friendly layout from a stair perspective.)
Four Seasons have always been excellent.
We just booked the Four Seasons Florence, Mandarin Milan, Aman Venice, and the Dolder Grand for xmas/New Years with our 2.5 year old. I'll let you know how those stack up next year.