I just posted a query about the same! Didn't get any good reviews about kidzee! Did you visit any other preschools? I visited Serra international so far, it's good but the fees are on the higher side...
My kids goes Cute and Smart day care and couple of kids from daycare go to Tree House I guess.
Tree House is next door to them and have seen decent number of kids there as well so I guess should be good.
PS My kids age is 18 month and 6 years