I have had the IAG lights since April 23 with no problems and really like them. I did not have to install the TAP as IAG installed that for me at Bronco Super Celebration East so not sure how difficult that really is.
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I have the IAG - very happy with the product.Oh, I understand they are made in China, and probably by the same manufacturer as you state, but the Mabbet is the easier install, and I for one do not like screwing with electrical as it is not my strong suit.