I own three: a 301, a 350, and the new 551. The 301 is built by a tank and very durable. To be honest, I haven't used the 350, it's the limited elmax steel model and I just bought it to stick in the collection. The 551 is actually arriving tomorrow, so I can't speak much on that yet either. So, regarding the 301, it's big - even by my standard, and I like big folders. Quality is excellent. I really have nothing negative to say about it other than some people will find it to be to large to carry comfortably in a pocket. Here's the thing with ZT that will probably get me in trouble with other knife guys, but it's just as I see it: I also have 1 Strider SMF ( but I've owned 4 striders ), and three Chris Reeve folders ( 2 Sebs, and 1 Umnum ). The ZT 300 / 301 / 302 is every bit as solid as either the Strider or CR, as well built and durrable, and they sell for half the price - bottom line. I love the look of Strider, but their QC stinks in my experience - that's taking into account what they cost. There simply isn't any excuse for a 4 to 500 dollar knife to be so inconsistant with sharpness, lock up, and blade centering, but striders have issues. That's why I prefer CR between the two - very good QC, but not as sexy looking as a Strider. Along comes ZT: The build is as solid as Strider or more so, although again not quite as sexy IMO, and the QC from the number of ZT's I've handled is top shelf. Bottom Line: When compared with the competition from all makers, it's very hard to get more knife for the money than is offered from ZT.