Not everyone shares Carl's opinions of LRL. I would agree that I don't see a scientific basis for them to work, but I don't believe that is a reason not to try it if you plan to build one to test. I would suggest if you have an interest in it to just go ahead and build one, it won't cost that much money, and see if you get positive results or not. Carl is very biased against LRLs but he was not as near as negative as I was when I first visited the LRL forum and hassled those guys back in 1996. Then I was persuaded to try it and was surprised at what I could do with it. I'm not saying they work or they don't, I'm just saying you should not let anyone bias you one way or another and just develop your own opinions based on your own results.
Good luck,
FJ