I bought VantagePoint some years ago when I had just started on my trading journey, searching for the "Holy Grail" as many beginners do. I sent it back fairly quickly and got my money back. I am now of the opinion that all I need to succeed is available for free on sites such as this, and within myself. From what you have said I conclude that it is not suitable for "beginners" at all, as you need to be fairly proficient at interpreting the data to make it useful. This was not explained to me when I purchased it.
I think most people form an impression of a company based on the efficiency, politeness, knowledge etc of the person on the end of the phone. This "impression" is then partly taken into account when you decide whether or not to deal with them. I do not believe it unreasonable to expect the salepersons of a business to be knowledgeable about the product or service being sold. The impression that this person gave me was the only ability she had was to take my credit card payment details. Apart from this her knowledge was minimal, and wouldn't be able to answer any basic questions I had about the product, such as "Do you provide data for the YM?". I certainly would not run a business in this way.
If you and others have managed to find a way to make it work for you then that is excellent. At the time I didn't have the ability to do this, and I probably still don't have the ability now. Therefore, if someone were to ask me my opinion of VantagePoint I would tell them my story, and say that my personal opinion is low; but however, it may be possible to benefit from the product if you have the requisite time and experience. I would suggest to them that they may be better off doing their own study and research, and create their own system and plan.