Indeedy doody...
My 1 and only complaint was that they got noisy after a couple of years. That being said, my truck doesn't have an easy life. Between each leaf pad, I had an impressive amount of crud built up. It just took some scraping and cleaning, slapped some grease on the pads and silent ever since. And, to be fair, this would've happened to any leaf pack... it's just maintenance on an abused truck...
Otherwise.... great flex, great carrying loads, I think they may have settled a half inch, if not less, in the last 2+ years of oh-so-much abuse... no legitimate complaints here! Haha