This review is from the perspective of someone who has fully read the material, but has not yet run it.
If you're already familiar with deathbybadger's other work, you probably already have an idea of what you'll think of this adventure. The style of grim, existential horror, crushing bleakness, and unnervingly disarming humor that made the City of Eyes unique is fully present in the frozen world of Solace. Whether or not that style resonated with you will tell you a lot about whether or not you should buy this module.
What sets Solace apart from not only its predecessors but also from most every other adventure is the sense of loneliness it seems built to press upon your party. There are no NPCs to meet or save, only dark echoes to show where there used to be life. There are no monsters to battle, but your party will still be hounded constantly by the feeling that something is lurking just beyond that next snow drift. Indeed, as the adventure seems designed to almost guarantee that not everybody makes it to the end (which is, in itself, a punch to the gut), the player's are likely to experience the dread of being the last man standing, or more likely crawling, upon the dead face of Solace as much as they dread their likely demise.
Well-written, neatly put together in terms of flow and pacing, and guaranteed to give your players a wholly unique experience that will ensure they never trust you again, I highly recommend this product to anyone looking to dive into a new blend of horror at their table.
[5 of 5 Stars!]