Four stars. It's a decent collection, and I've definitely found some useful prompts in here that have sparked some creative ideas. However, a fair number of the prompts were either repetitive or just didn't work as well as advertised. The organization could also use some improvement; it would be helpful to have categories or tags to easily find specific types of prompts. Overall, it's a good value for the price, but don't expect every single prompt to be a winner.