The only bad thing about my stay was definitely the food! Ecuadorians love to eat the same thing every day - and this means rice! But a nice alternative to the food in your host family or the cheap almuerzos in town is that there are plenty of really good restaurants serving international food.
My advise to all other future Spanish students? Enjoy your time as much as you can! Ecuador, Quito and Ailola offers you the best opportunity to have a great language learning experience.
The most important thing is that you practice besides your classes. I stayed with a Host family and tried to communicate with them as much as I could - they are used to foreign students and are very patient with you and your Spanish. Normally they don't speak any English so you HAVE to speak Spanish, and that is what its all about! My Spanish improved pretty fast, with only a few words in Spanish before I came to Ecuador I am now able to understand a lot and to have great conversations with native speakers!
Its not easy to find local Friends within a short time, but you should avoid speaking English or your own language the whole time, try to be strict!