I can imagine where adamzero is coming from. I don't have the starter kit myself, but I've read the description of the contents.
The GTD materials are a very broad discussion of the GTD approach including the rationale for its effectiveness, some background history, a detailed description of the whole approach and also the structures of the workflow and six horizons etc.
As a person wanting to implement GTD on your own, you have to read the whole thing to get the approach and understand it then decide how you want to start and design that.
It's a great method and well worth all the effort, but not what someone would expect from something called a starter kit. In general, I think there is a major topic around the incremental implementation of GTD that has not been addressed. For example, what could you read in one hour and then go and implement today that would give you value? And then the second day and so on. In short: what's my next action ?!
I think a starter kit might be something that gets you going in twenty days ( one hour per working day for a month ) and then directs you to the materials for continuous improvement. Week one could cover the workflow, week two project planning and tracking, week three the six horizons and week four set you up for ongoing development.