Darkest Dungeon... Worth it?

I'd say it's probably worth it if you don't have a lot of other games to play right now.

I really like it, but be prepared to play it for a little while and not get too attached to individual characters.

I'm still waiting for it to go down in price. I've had it on my wishlist forever but recently they jacked up the base price when it came out of early access.

One of the few Early Access games that turned out fantastic. It's hard, but even so it's enjoyable and the biggest loss when your heroes die is that you have to get new ones to strengthen. So yes, I'd say you should get it. If you like the art style, the turn-based row-positioned combat and, of course, the awesome narrator, then get it.

I've had a lot of fun with it, myself.

I've heard it's hard, but unlike Dark Souls or XCom for example, this game is not fair besides being hard. I've pirated to try it out because I intended to buy it, and gotta say it is true, RNG > skill. I can only agree with the majority of the steam reviews.

Maybe you should give it a shot before buying it too.

Yep, it's a really good game.
People like to say that it's insanely hard and unfair, but honestly (apart from the rare moments where you get REALLY unlucky) it is quite fair. You are always given the option of backing out of bad situations before they go out of control and with the right party compositions you can make it so that it's nearly impossible to end up in a critically bad situation in the first place. In fact, in retrospect, the majority of heroes I lost were because I got too greedy and kept going even after the odds had stacked up against me.
I guess I would best compare it to XCOM: Enemy Unknow on Ironman Mode- after you have a good idea of what you're doing you almost never lose anyone. :)