Alternative choices to American school (Mexico City)

Hello everyone : )

We have the opportunity to move to Mexico City... Currently living in Shanghai my kids are at bilingual English/chinese school. They are 5 and 7 years. We have been advised on The American school as it is near to where my husband would be working (green gates too far away). Please could anyone tell me if there are any alternative international schools they would recommend? They don't speak any Spanish as yet ; )

Also any info on American Middle school most helpful too!

Many thanks for your time