I was interested to see this offer from Jimmy and I decided to invest and test. Wow, is all I can say - an amazing set of results with some good live GBP map movement within (in some cases) a few hours for some fairly chunky search terms. While other GBPs take longer, there is generally good benefit, especially for moving from 20+ or 10+ to the top 5/4/3.
The method is easy to implement and support is great - very responsive. The addition of a private closed group is also beneficial allowing users to comment, report and advise freely. Jim is very active in the group which is also great to see.
Echoing Jimmy's words I would stress that the need to have everything optimized on the main business website served by the GBP is really important so, before launching off into this method, make sure your sites are well optimized (Jimmy, more on this for some could be useful?)
With time, Jimmy and his team have continued to improve both the product and introduce some further updated videos (very helpful indeed). No hesitation in recommending this approach and Jimmy's product. Maps gold!