I had fun watching this, but I'd be hard-pressed to recommend this series to anyone above the age of 10.
Positives: Very good concept, reminiscent of a tabletop RPG. The mystery and action will keep you interested. There is an interesting world to discover in the Hollow. The characters are nothing special, but when they work together, they have a good dynamic.
Negatives: The dialogue is mostly stale. The humor is very hit and miss, emphasis on miss. The plot is sometimes nonsensical. It really sucks when the audience is much smarter than the characters. The series is not sure of what it is, is it a Rick and Morty style cartoon for adults? Is it aimed at teenagers? Is it aimed at children? No one knows. It tries to do all 3, but does so very badly. When characters are talking or trying to do something, there are annoying pauses between each character, which ruin the pacing.