I've been to Manta for a week in July 2009 to their main spot Santa Marianita - some kilometers south of Manta.
First thing you have to know is windy months are during summertime from June-Sept, and at this time there is no brake there - it's just flat and chopy. Wind is only thermal and if there is no direct sun heat, wind does not pick up. When it does most of the time it's average 6-9 m/s so you need only big quiver. Otherwise beach is empty and wide, there are few hotels looking like cathouses but in Manta should be better to sleep. Good thing there is you can ride with Humpbacks during June-July
There is only one kitecentre runned by some brasilians and you can rent equipment. They also arrange tranfers, kite trips, hotels, downwinders, etc... If you are heading there I can give you contacts.
Honestly if I were you and if you are not a begginer, I would pick up Peru for sure!
Good luck and lots of wind wherever you go