Yup, as said above. I don't think there is a such thing as 100% sealed wetsuit kit. But I am happy with Drylock seal. Haven't tried any rival boots so can't speak in comparison but I'm happy with it. I also agree with the feel of the sole. So soulful.
Also, slightly off topic, but as you mentioned Jamez, I bought one of those new "rubbery" of 1.5mm Alder gloves on that weekend recommended by a shop. Came out of the shop half unconvinced but oh my giddigadonga, it was way better than my 5mm Gul Power gloves. Probably let same amount of water, if not marginally less, and kept my fingers as warm as the 5mm but the lightness and the dexterity was next to not having a glove at all! Well chuffed.
I wish the same could happen with boots, but I guess it's bit difficult with feet as it's submerged under water most of the time.