A worthy follow-up to Kona with an equally strong winter atmosphere and an interesting story. The map (or maps, rather; the world is divided into several chunks) is now considerably bigger than in the first part, and there are more NPCs around (I think the first part had just one). There's more variety in the game's locations and gunplay is better with realistic, "punchy" weapons. There's also some scope for exploration if you want to get all the achievements (although there's nothing particularly challenging or time-consuming).
However, there are several not-so-slight problems. At one point you visit some underground facility. The whole place revolves around a puzzle involving finding, carrying around and then using batteries to power up various segments of the facility. The idea is good, but in practice there's just way too much of tedious legwork, as you find yourself walking through the same corridors back and forth a billion times.
A bigger problem is that the game is way too easy even on the "Survival" skill setting. You take very little damage from enemies and always have a ton of supplies to rely on; there's basically zero risk of running out of anything even if you don't try to conserve your items. Environmental hazards like cold are practically irrelevant now. (This also makes the various herbs completely useless.) This complete lack of challenge removes any sense of tension and suspense from the game. Then there are smaller issues like being unable to bind hotkeys (you need to select weapons from a menu) and weird but minor oversights like being unable to use the mouse to adjust sliders in the options menu.
Still, aside from the tedium in the facility segment and the game being extremely easy, Kona 2 is well worth playing if you're into heavily atmospheric games with an engaging story. (I'd also recommend leaving the French audio on for the sake of immersion; the game does take place in Quebec after all.)

Worth it on sale

Boring, repetitive and overall dull game.
The idea of the game is great but execution is just terrible.
Why there is the same quest through out entire game(find something and deliver it 100 times until game ends)?
Why would NPC speak only french? I wish they made them speak English in first place so we dont have to focus on subtitles but actually listen the dialogue.