It's amazing! I picked up one about a week or so ago and I'm truly amazed at how ergonomic and useful I find this knife. Most of my tactical chores are in the kitchen and around the house and the Perrin has performed superbly. The grip, though it looks a bit odd to me, fits my hand very well and securely in sabre grip while allowing it to also be repositioned a bit for delicate cutting tasks. This is my first VG-10 blade and I'm impressed with the steel and factory edge. I haven't tried to abuse the knife at all since I bought it as a general purpose, lightweight carry knife. Did I say lightweight? It's as light or more lightweight than most of the folders I carry and that means I'll carry it a lot more. It does not appear to sacrifice too much strength for it's light weight either, but that's my subjective opinion since I haven't tried to use it as a prybar. I did stab it repeatedly into an old wooden filing cabinet that was on it's way to the dump, just so I could test grip security. I was pleasantly surprised at the excellent grip security and depth of penetration. No damage to the blade of course since this was simply a straight line stab. The 5" blade is about perfect for me for any daily cutting chore I'd need around the house, out camping, hiking, or for last ditch self-defense work. When I'm out in the woods and need to clear a trail or something like that, I'm using a machete and an axe or hatchet anyway, not a knife. However, as previously mentioned, 99% of my knife chores are general purpose cutting and food prep which is where I find this knife is excellent As others have mentioned, the full flat grind gives this baby real good slicing ability. Did I mention I like this knife, a whole lot?!?! I have a Gerber Yari, and I had a BM Nimravus, and for me personally, the Perrin fills the roll of general utility fixed blade the best of those three. If I were to attempt much prying however, I'd probably want to go with the Yari or Nimravus, but I don't pry too much with a knife so there you have it. If someone would like to donate a Perrin for some really tough around-the-home destructive testing, I'll be happy to do it and report it back here, but I'm not killing the only Perrin I've got.
My only difficulty with this knife has been it's sheath. I can turn my sheath upside down, jerk downward and stop suddenly and the knife will come out, so I won't be wearing it inverted. It came with a small tek-lock which would be great, except for the fact that I wear a 1 3/4" wide belt because I have a CCW permit and the wider belt supports my pistol much better than a narrow one. A G-clip or something like that would be a nice option on the sheath. An S30V blade would also be a nice option. Here's a crazy kicker for you... in North Carolina, wear I live, I can have my CCW for a pistol, but it's illegal for me to carry a concealed fixed bladed knife of any size. Who writes these laws? I've taken the tek-lock off of my sheath and I just slip it into my back pocket. It's easy enough to reach when I'm working on something around the house. When I leave the house and I've forgotten it's in my pocket, it slides down diagonally in my pocket and is completely concealed so no one even notices the horrible, illegal mistake I've made.

With the deep choil on this knife, I think it would be relatively easy for a custom sheathmaker, like Normark for example, to make a kydex sheath that holds the knife very securely. All in all, the factory sheath really isn't that bad, it's mainly that I can fit it on any of the belts I routinely wear.
I wasn't real interested when I first saw this knife on the internet because I frankly thought it looked a bit odd and uncomfortable. However, I read some reviews and was working in the kitchen one day with several of my kitchen knives and started paying attention to the handle designs of the real ergonomic ones. Something clicked and I decided to give the Perrin a try and I'm so very happy that I did.
I am extremely impressed with the work that Mr. Perrin did on this design and on Spyderco's efforts to put it into production with fantastic materials and QA/QC. I congratulate you all. I'd love to have a few more of these knives around my house and car, and one for every member of my family, because they are simply that good, IMHO.