Is this game still worth buying?

I know the title is a little subjective but Ive been looking at the game and it looks pretty interesting but Ive read some not so promising reviews about it. It's currently on sale for 12 USD on steam. My buddy and I wanted to playthrough the game together. So what I'm wondering is:

Is the game worth it?

About how many hours of play can we expect?

Are the devs still updating the game consistently?