International schools/ nursery (Hanoi)

Hello,

Could you please recommend international schools in Hanoi? We are considering Concordia and UNIS for our 4 and 5 years old children and also looking for options for our 18 months old.
I would love to read some personal experience as both schools seem very good on their website. I would be also interested which area is nice for a family with small kids to live in, in proximity of schools and/or city centre.

Thanks for all info!

Zsofia & Khaldoun