My father had some offer through the post with highly glossy brochure and sample pages of a build up week by week computer publication. It was absolute rubbish. Out of date (no mention of Windows XP) and gave not only incorrect but, dangerous advice. I heard from others as well that the publishers incorrectly claim you have subscribed and then demand money with threats of legal action.
I don't know if this is the same publication but in my view you would be far better off buying PC Advisor monthly and coming here.
Post more detail of who this is from and perhaps we (I) can say if it's the same outfit.