Divis Mortis is an excellent first foray into interactive fiction, with strong writing and good puzzles.
As a zombie survival game, it draws heavily on common tropes, making the player feel comfortably at home in terms of understanding and reacting to the situation. Descriptions are properly gruesome, with human limbs and putrid flesh strewn about, but always with a certain distance; the PC finds it as repulsive as you do. The particular scenario here is well imagined and cleverly told, providing an intense sense of danger, further heightened with several urgent matters for the player's attention.
According to another reviewer, there is apparently one way of getting locked out of victory without realising it, if you do things in the wrong order. If this is the case, it was probably an oversight by the author, and nothing that I experienced myself. Apart from that, however, I would place this game as Polite on the forgiveness scale; there are many ways of dying, but a simple UNDO always let me correct my mistake and carry on. Personally, I found all the puzzles I encountered well clued, perfectly reasonable, and very much in the spirit of the situation, without being overly simple.