Re Stroud's remarks on PLB, I'll save you the trouble of looking it up in the book, having just read it. He tried a PLB in Belize and got no response. For this reason (and for certain financial considerations, no doubt), in his book, he promotes SPOT as more effective than a PLB.
Since SPOT's operators call 911, I wouldn't expect it to be too effective in Belize, either. You can't get help from people who aren't organized to provide it.
Yup, that was the section... Didn't seem to make sense to use SPOT either... Then again, I don't plan on being in Belize any time soon.