Good post. But, I will take exception to several of the comments.
While you may think that I am unfair, let me explain why I make those comments.
Since I am a manufacturer of electronics including zappers for 15 years and other electronic products for over 40 years, I am very knowledgeable in regards to what it costs to manufacture and sell a product.
The UZ people have, by far, the highest markup in the industry. In addition, they have used very cheap components in the past and from what I am told by others, continue to do so.
Also, it also does have to do with the characteristics and evidence. See:
http://paradevices.com/ultimate_zapper_cheaply_made.html which clearly shows one of their products that was traded to us. The customer who traded that uz clearly rates ParaZapper products as superior and has done so several times on this forum.
You stated, " it is his business only."
NO, it is the customer's right to know what other think. The point is that if I only read what he writes, I might be convinced that it was a great deal when in reality, it is the last zapper that I would want to buy.
You said "The UZ offers 30 days trial with money back guarantee, and it seems to be the only one"
Again, NO. ParaZapper offers a 30 day money back guarantee. The problem is that if you look back on this forum, there have been several complaints that the uz people seem to have some problems honoring their 30 day money back.
You said, "The site of the UZ provides good information too that may be useful to someone"
While this is true, some of their data is definitely skewed.
You said "None of the sites of the various producers mentions specific customer satisfaction data, like how many units sold, how many returns, how many complaints for ineffectiveness"
Go back and visit a few of the pages on
http://paradevices.com, yes, there are statistics posted.
You said "As every one is different and reacts differently to the Zapping, one can get great results with a specific Zapper and another can get great results with another."
Ahhh! Yes! That is why
ParaZapper provides 6 zappers in one with superior quality and at a far lower price
http://huldaclarkparazapper.com
So, I believe that your claims are unfair because, there are other zappers that I do recommend and among the zappers available today, the uz is probably the last zapper that I would ever consider buying. And, I must be an expert because I have tried many different zappers.
You are correct to the point that everyone has to make their own choices but I would hope that they would make well informed choices.