The case consists of 2 individual layers: the first is a silicone case, which is just the more casual Trident Perseus, and the 2nd is the polycarbonate addon which turns it into the Kraken. You can use only the silicone layer if you like.
There were no fitment issues with just the silicone layer since it's flexible, but when I added the polycarbonate layer, it became a little tricky because of my thick GLAS.t screen protector. The fit is very tight and it took me a little adjusting to get it to sit well, but it's working well now.
The only gripes I have so far is the cover for the S-pen. Unlike the USB and headphone covers, there are no hinges or anything to secure the S-pen cover to the rest of the case, so it's just left hanging there all loose and free to flap around. You will be able to see it in the pictures. The second gripe I have is the kickstand. It's secured very tightly. Whenever I pop it out, it makes a loud popping sound and it feel like it's going to break off from the case.
Other than those issues, which are minor to me, I'm loving this case! It overall feels hefty and very solid in the hands. This case is huuuuge compared to my Seidio Active. It makes the already huge Galaxy Note even bigger and heavier. This case is not for everyone, but I figure if you are the type that would buy the Kraken, size shouldn't be an issue to you. If you do want the flexibility of going less rugged when you want, you can always just remove the polycarbonate layer.
Here are some pictures I just snapped:
You can clearly see the S-pen cover here:
Here's the case with just the silicone layer:
Here's one comparing the sizes of the Seidio Active and just the silicone layer of the Trident Kraken. They are about the same thickness and same size, with the Trident just a hair taller.
Here's one comparing the size of the Kraken and the naked Note:
Here's some comparing the thickness of the Kraken and the naked Note:
As you can see, it pretty much doubles the thickness of the phone.