I have had these knives for a few years. I have carried them around but have used the blade only a few times for minor things.(normally cutting open a box..sad jobs for these blades)
First, the Griptilian Tanto 553, this has been in my room for several years. I used this several time to open boxes but nothing more. The blade is in excellent condition, just some wear on the clip as usual. I have the box for this knife as well.
Next, A monster Rukus 610, this is a monster of a knife, I bought it hoping to use it for camping adventures, but have never gotten around to going camping so it hasnt been used much at all. The blade is also in excellent condition, with wear on the clip as well. I seem to have lost the case