7am-5pm seems like a very long time. What is their curriculum like? Do they have breaks? Do they teach other subjects? Is their methodology child-centred?
Is their curriculum comapatible with your child? And how is your child's relationship with the Qur'an like? How mature is he?
Allahua'lam, it is hard to say with very little details. Maybe Umm Ibraheem could help, inshaAllah.