Value of review sites

Being dissatisfied with my current VUMATEL based ISP I decided that it was time to move on. So I started looking at reviews of the available ISPs using Hellopeter and other review sites. What became clear was that: * All of the ISPs reviewed were dreadful according to the reviewers (Welcome to modern South Africa) * There was a huge disparity of the pictures painted by the review sites. i.e. one site showed all six stars for one ISP whilst the others showed 97% one star. * Even in Hellopeter's site there was a huge disparity of reviews i.e. 90% one star and 10% six star for most ISPs. So the questions this poses for me are: * Which review sites can I, or any one else, trust? * Do the ISPs write bogus reviews of themselves giving only sixes? * Do ISPs write ****py reviews of their competitors giving one star and submit them to the review site? Most important of all, do any of the review sites ever check any of the reviews submitted for validity? Keith White