This has become my main weapon, alongside the Gold Dynamo Roller and possibly Splat Roller and .52 Gal Deco.
I'm really feeling its mix of range, power and speed. It has enough power and range to be respectable in combat, and its speed, while not Inkbrush SONIC SPEED, is pretty great. This thing required me to change my loadout, going for Damage Ups and Ink Saver Mains instead of my previously usual Special Charge Up and Ink Saver Sub-heavy loadout, but it's paid off quite a bit. I finally found a weapon that fits my playstyle; I like to attack aggressively, rushing straight into enemy territory, and the speed is great for getting into enemy territory, while the respectable power, alright range, and wide swing radius are great when I get into combat. And with this playstyle, Squid Beakons are actually kind of useful, since I can place them where I want to return to when I get splatted or place them so my teammates can get close to where I am while I press forward. Additionally, the Kraken is a good all-purpose Special; even if it still sucks at attacking like I said earlier in this thread, it's still good for running away from better-ranged enemies (or even deeper behind enemy lines; this idea has its moments).
And while the Octobrush is still not optimized for offense, like I said before, it's more of a balanced Inkbrush-type weapon, which is certainly nice. It's become my main weapon, I've certainly changed some of my opinions on it (it's a good weapon, better than I gave it credit for previously, but it's not great for offense (despite my success with it on offense, this is still true, at least I think so), it still has no way to attack outside of its swing range (which is mostly bad because it struggles against good Chargers and midrange combat because of this), Kraken continues to be bad for attacking outside of ambushes, and it's still not good to rely on Specials to compensate for your weapon's weaknesses).
On a related note, can't wait for the Octobrush Nouveau and its Splat Bombs (also Splat Bomb Rush, that'll be good too). Finally, the offensive Inkbrush I've been waiting for!
It's weird how I keep enjoying weapons I started off disliking, between this, the Gold Dynamo Roller, the Splat Roller, the L3 Nozzlenose (though that didn't stick in my arsenal, I do like it).