I sent my daughter to Julia Gabriel's Play Nest and did a trial at Growing Up Gifted.
My 2 cents' worth...the environment at JG is more structured as compared to GUG. Also, I felt that the teachers at JG were better. It could also be because we had a good teacher at JG. (Just FYI, during the trial at GUG, the teacher and assistants spoke broken English.) THAT was the deciding factor against me sending my daughter to GUG. Having said that, the fees at GUG are much cheaper though. Perhaps you can sign up for a trial at the schools and make a decision from there? Hope this helps.