Arnaud:The failure point is the seal. The Zip seals just make it easier to fix the failure.
How many people ever tear a seal? I have a TLS and CLX and just ordered another TLS. So, I looked into the zipseals. Here are the problems:
1) Most people seem to agree that the neck zipseal is not as comfortable. So, at a minimum get the regular latex neck seal. Neck seals are even harder to tear.
2) I have hundreds of hours in both of my suits and have never torn a wrist seal.
3) Replacing a glued wrist seal is actually pretty easy. Replacing a broken zip ring or whatever you want to call it can't be done in an afternoon. (Well, it can, but you would have to have more than just a new seal.)
4) While it is a neat design, it is possible to pop the zipseal loose/ break it. Given the basically bulletproof nature of latex wrist seals once they are actually on, this does introduce a much greater risk of flood. It may not be much greater statistically, but in really cold water or on dives where you can't immediately surface, it is not worth it.
I really like DUI suits but I wonder about some of their new changes. I have to spec every piece of a custom suit now to change the overlay, valves, boots, etc. just to get the "right" suit.