I’ve been using my trusty Lonely Planet guidebook for Ecuador for three years now and it is pretty comprehensive. Moon and National Geographic guidebooks are typically well researched as well, but I personally like LP’s style the best.
If you want to speak with other expats you could ask around on the Facebook expat groups or some of the other online forums. Or you can just show up at a cafe or watering hole frequented by expats and you’ll be sure to find friendly folks who are happy to chat about their experiences. I don’t think you’ll have too much trouble finding people who are willing to share their stories. Happy travels!