Hi Gretchen –
That is a tricky issue. As you know, the laws are constantly changing. I think the best advice I can give you is to talk to an Ecuadorian Attorney to get up-to-date information. There are several listed in our Rolodex page to get you started: https://members.internationalliving.com/country_clubs/ecuador/rolodex/
.. or of course, ask other expats who they may have used.
Frankly, we are still back-and-forth ourselves on whether or not to get one. Keep in mind only property and assets (bank accounts, for example) in Ecuador will be affected by Ecuadorian law. US assets will be distributed according to US law.
And by the way – I saw in a different post you brought some guitars into Ecuador – let me know if you are in the Salinas area and want to jam! I brought 6 bass guitars, one acoustic guitar, two electric, a Chapman Bass Stick, 4 ukuleles, an electric piano, digital recording equipment, and other assorted odds and ends.
-jim