First off, Aiola and ISE are the same school, and students are in the same classes. In my first week two of us were Ailola, and the second two students were ISE, it's all the same.
Eugenio and the staff are the absolute best! I did group classes for two weeks and a homestay in the student home run by Valeria. The house is a mix of local university students as well as international students studying Spanish. It was a great experience.
Not only are the lessons great, but the activities and trips throughout the week are also a lot of fun. Quito is a really cool city with plenty to do, and the day trips in and out of the city make the whole experience even better.
This school is set up very well. It's a great place to learn Spanish, and about Ecuadorian culture.
They also have a great travel network if you'd like to see it do anything while you're in Ecuador.