I ordered a basic mininet package for 40$. George was friendly and helpful, answering all my questions. He told me that the project should be completed within 72 hours, but it was done in 24. He is obviously keen to exceed expectations as a quick glance at the report he sent showed that he had produced much more than I had ordered.
The report I was sent was broken down by each layer, as described in the service. Working though all the links, I could see that a couple of the first layer we not showing, and by the end of the list, quite a few of the second layer bookmarks we not showing links. This was not particularly surprising, given the nature of bookmarking sites. However, and most importantly, the mininet supplied was larger than I had ordered, and the net result with broken links take into account was that the order was exceeded by about 20%.
The next stage, of course, will be to see how these links do and ultimately if it makes any difference to the rankings of the site the mininet is supporting. It looks like some of the links have been picked up by Yahoo within a few hours, and Google's 'latest' results are picking up some of these links. So I'm very confident that this was 40 dollars very well spent.
So my impression is positive all round. I will certainly use George again and go on to order more mininets for other sites that I manage. I am also engouraged enough to try some others of his services and happy to recommend him to others.