I tried the Slysz Spyderco chef thing, but it wasn't for me. Too much belly... didn't fit my cutting style. But if you're doing a lot of work off the board, or if you're an angler (or live at the beach) it's a great knife. The steel is close to rust proof, so it'd be great for cleaning fish.
I tried the Roc, but the blade is too thick and chunky to slice anything. It's not a great cutter, and has a very wide bevel. It's something you'd hack through bones with, if that wouldn't make the knife disgusting. The grippy G10 is very grippy. I don't know if I like that. It is a huge pocket monster. It sure is fun to open and close and open and close and open and close. But I can't find anything that I actually want to cut with it, so I'm probably going to sell it.
I also got a couple of blades based on the traditional Italian Pattada / resolza pocketknife. I found out about this blade style in this clip of Anthony Bourdain on No Reservations, which focuses on the knife style:
[video=youtube;8bez-pMf8Rw]https://www.youtube.com/watch?v=8bez-pMf8Rw[/video]
The traditional versions have non-locking, high carbon blades with handle scales made from animal horn. The ones I got are modern takes that have modern scale materials, locking blades, and stainless steel. The ones I got are the Spyderco Pattada and the Extrema Ratio Resolza, which are both made in Italy with the same sort of blade steel. The Spyderco has contoured G10 scales, which are a luxury to hold. The blade stock is thick by kitchen standards, but the grind is nice enough to do some sausage slicing (but it's best for non-food items). The satin finish shows fingerprints like nobody's business. The scales on the Resolza are made of aluminum, and the blade has a matted stone-washed finish that I prefer. Both are pretty badass. I paid roughly the same amount for each new. The ER was purchased from Xtremeknives.com, which offers an additional discount if you pay via money order (which I did).
Here are some pics of the Spidercos next to my Delica. Until recently, the Delica has been my only folding knife, and I've had it for 17 years.
Comparison shots of the Resolza and the Pattada:
The ER is much lighter than the Pattada, even though it's longer. 93.5g for the ER vs 117.8g for the Spyderco. The ER will open with one hand, but with some effort. If you adjust the pivot slightly, it will snap open with a flick of the wrist. There's some jimping on the liner lock mechanism. There are no proper liners, but the scales are aluminum so it makes sense. The screws on the scales protrude from the body slightly, where they're either flush or slightly recessed on the Pattada. The stonewashed finish on the blade is fantastic, if not traditional. The sharpening choil is much appreciated. The blade tapers more quickly than on the Pattada, and was slightly sharper out of the box (though both could shave). The top side of the blade has been rounded slightly on the sides (similar to the Spyderco Slysz Bowie) while the Pattada has hard edges. Obviously, there's no clip. The black finish on the aluminum scales looks great, but I'm sure it would get bashed to **** if you carried it in your pocket with any real regularity. The contours on the handle are nice from an ergonomic standpoint, but not quite as nice as the machined G10 scales on the Pattada.
There's lots to like about both, but they're very different knives despite their shared heritage.
The Resolza looks to be a better knife for culinary purposes, but I haven't put it to the test.
It also comes in a freakishly large 150mm size. Bajabbers!
Still trying to find a Dark Talon.