Overall good
The Solve Game Guide helped me to prepare for the game, feel confident throughout the process, and not lose time on figuring out the rules and the game setup. At the same time, I would say that most of its information was available on the Internet for free. However, a part of it was unique. Therefore, if you have doubts about whether you covered everything with the publicly available info, don't feel confident enough, and have money at hand, I would recommend buying the guide at least to have that peace of mind it gives. If not, you can also prepare 80-90% by spending a day on YouTube and a few websites.