The reason they're smelly is because of the sulfur in them, which is a beauty element. Sulfur is amazing for the skin because it stimulants healing and collagen formation.
Once again, I want to feature one of Markus Rothkranz's videos.
He does such a great job explaining why durian is such an awesome plant.
So I basically prepared mine the same way, except for without the coconut water and I also ended up putting a lot of it in my morning blended juice. Another great way to eat it is to put it in the freezer for a while so that it hardens into an ice cream consistency, and that also stops the smell once again. This is yummy, and works out great for the spring or summer time when one's craving a cold treat. Definitely pick one up if you haven't tried it yet. It takes a bit of getting use to if it's your first time, but it's totally worth it.
Cheers and happy living.