Among the Sleep probably has minimal replay value, but as an original virtual experience and psychological exploration, it's really worth at least one play through. You play as a toddler in search of their mother, with only a talking (!) teddy bear for comfort and guidance. The world-building is very good; you see everything through the eyes of the kid, which leads to some fairly fantastical levels. The experience also has compelling atmosphere: sound design, lighting, and visual effects all work very well to fill the player with foreboding and dread.
As far as a stealth horror experience, this title is more like a video game companion to The Babadook, running a similar sort of story. As such, the focus is more on the narrative and tension than on outright running and hiding from monsters. I felt this was a bit of a mistake on the part of the designers. The original concept was to have imaginative childhood apparations chasing you through the whole game, but this really only happens in the middle level, the overgown house. It's a shame because the game needs more of a sense of threat. At least one level has it, and it's a lot of fun, especially given that you're a tiny child that can hide under so many objects.
Among the Sleep is best experienced in a single playthrough, so that tension and dread is sustained. Carve out three hours, and spend some time discovering how scary the world can appear to a little child.