Re: Not my kind of humor, but
Seriously, the huge advantage of W3W is ease and clarity. If I am stuck in a difficult situation, I may be unable to accurately read out any of the other options - none of which trip off the tongue, and so are much harder to read accurately and *much* harder to remember if you don't have the ability to write them down as they are read out.
The downsides are that it does have some ambiguities, although as has been pointed out most synonym words will point you to an obviously ridiculous answer. "Hello, I've just got to Little Snodbury, can't find your house". "grumble.toad,pizza". "But that's in Siberia". "Sorry, grumble.toads.pizza".
And of course it's not great for non-English speakers, but making a multi-language version should not be as great an effort. Just do a literal translation of all words, and where there isn't one, substitute.
I have used it exactly once to find a spot where one of our gliders had landed out. It took me to the nose of the aircraft, which was impressive.