I have just returned from two weeks in Ecuador - locations in the Andes and Amazonia, but not the Galapagos. The general feeling among my travel companions and other birders we met is that the Ridgely guide is the best in terms of info and color accuracy of drawings. Most people divided their copy into three sections - intro, plates, species accounts - and carried only the plates in to the field. Have a great trip - it is an incredible country on all accounts! Great food, nice people, stellar guides, spectacular landscapes and fantastic birds.
-Ruth Richards