Cheben is a rather basic adventure. It does very few things wrong, but doesn't do anything particularly imaginative either.
The basic premise of the adventure is there is a rather typical fantasy village besieged by low level monsters: goblins in an old armory, skeletons and zombies out by the graveyard, and some rather neat low-level constructs in an abandoned library.
However, the world, the village and the threats are nothing that even an entry-level GM couldn't come up with on their own. Local NPCs are defined mostly by what gear they have to trade the player characters rather than by personal motivation, and the example dialogue is flat and noninflected. There's no roleplay hooks for any of the local NPCs- they are as emotionless as the townsfolk in an early Final Fantasy CRPG. They have one or two lines of dialogue and a few things to sell the PCs, nothing more.
I would love to see the adventure re-released with expanded personalities and goals for the major NPCs, more villagers to interact with. Even bullet-pointed lists of personality tics or relations with other villagers would go a long way in bringing the villagers to life.
As it stands now, the layout is very clean and mostly legible (though there were some cut and paste errors in the statblocks of the abandoned library's guardians). The pages are sparse though, with only 3-4 pieces of amateurish, 'old school' art scattered throughout. I'm sorry, with stock art as cheap and readily available on this site as it is, there is no excuse for poorly illustrated gaming PDFs.
However, the basic skeleton of the adventure had potential. I'd love to see Cheben re-released soon with corrected statblocks for the library monsters, additional art and a punched up layout, and more NPC depth.