Well I just got my ZT 0550 in the mail today. First impression out of box was "dang this thing is thick", the knife definitely does not lack in the muscle department. It is just big, thick and solid. The lockup is great, its smooth and sexy looking to boot. I carried it all day and despite the weight I noticed no difference from my usual Manix 2. The clip is awesome. Its short (which I love), very firm and the finish is perfect. Flipping it open does take some getting used to but once you find the right position it fly's out. I cut up a bunch of thick TV box cardboard with no problems. Dont expect it to be a smooth slice because its just not designed for that. It was much easier to cut through the same cardboard with my FFG manix 2 but I was expecting that. The S35Vn held up great, after cutting through the entire box it cut through computer paper the same way it cut before I started. Anyway I like the knife enough to keep it in my EDC rotation and plan on putting it to hard use in the future.
Here is a crappy cell pic I took after cutting the cardboard.
Here is a crappy cell pic I took after cutting the cardboard.