I have an EW deck with the heavy duty cord. It's 6months old now. I'm really happy with this deck. It's far better than my previous deck which cost a fair bit more. Value for money I don't think you can go past it.
As far as implosion resistance, the cord seems very strong and I've not had it pop off or anything before. I mainly playboat and spend a little time in the surf. I don't use a thruster or anything to help with implosion. Also spent 2 weeks on the west coast of NZ in Jan with it. Still no complaints, I'm really happy with it, especially for the price, and it's made locally!