The Kiwi 4 my favorite of the unofficial series of Sal folders designed to provide maximum cutting power in the smallest possible package. By "series" I mean this encompasses knives like the Dragonfly 2, Caly 3 and 3.5, and now the Kiwi 4. The latter three are Moki builds, which I have come to love for their maximized cutting power in discreet and featherweight format.
Here is a picture of the Kiwi 4 next to the Caly knives...
Now, when the Kiwi 4 first was announced/released I saw the usual "I will never buy this because it isn't a real Kiwi" and "I will never buy this because it has pins instead of screws" complaints by people beholden to the original design. Of course, these will be the same people crying when it is discontinued for low sales. It's the Spyderco cycle, and it plays out faithfully every single time.
As for me, I love it. I need a folder that is ambidextrous (100%, not just a swappable clip), small, inconspicuous, non-threatening, etc. The Kiwi 4 manages all these things better than either Caly I have, and even better than the Dragonfly 2 which rides a little higher in the pocket. I love all of these other knives but the Kiwi 4's slimmer profile and significant weight reduction (it's even slightly lighter than the Dragonfly 2, which has thicker liners) makes it an easy choice for regular carry. The straight edge does take some getting used to and it won't slice an apple with the finesse of a Caly, but it also works great in hard to reach places without substantial risk of injury. I mean, it's not really a wharncliffe as much as a sheepfoot, as there is really no front-facing tip to it.
As for the pins... I don't know how Sal would have packed the spring and blade into these narrow handles without them. And I can still clean the knife without taking it apart. When I first bought this I was fresh off of a traditional knife bender and had gotten pretty used to rinsing knives in the river and using a drop of oil to flush moisture out of the recesses and pivot. So I wouldn't worry about the pins unless they foil some customization plan you have. My only real complaint is the position of the last pin, which pushes the clip further up the handle. You can see that the Caly knives have a deeper carry design and this does matter to me a lot, but not enough to throw out this particular baby with the bathwater.
Now on the face of it you might think the price is high compared to some of the designer series knives or any of the stuff coming out of Taichung. But there really isn't anything like the Kiwi 4... in my opinion it is Sal's ultimate attempt to make the most compact knife possible with a full grip and decently large cutting edge. If you handle the Kiwi 4 and the Des Horn you will see that even semi-similar designs really don't have the same sense of purpose. So if you like Sal's design work then you owe it to yourself to buy this while you can. Right now the prices are competitive and supplies are plentiful, and as we know that can sometimes change very quickly.