Not actually as good as Warhammer Quest 1 by the same devs (different company, but the same warm bodies; Rodeo Games went bust after Warhammer 40k: Deathwatch didn't make its money back). Less content and somewhat less artful graphic design than WarQuest 1. I don't precisely regret buying it on iOs, but I paid $4 for it, which doesn't seem unfair. But be sure that you want in on what this is before paying $20 for it.
I could go on and on. I could talk about the fantastic art design, brilliant use of color, pitch-perfect voice acting, terrifying atmosphere, or anything else. But I won't. I'll just say this. In over two decades of video gaming, System Shock 2 is my favorite game. Out of all of them. #1. And it's not a hard call. Get it. Try it. It's the best.