dont listen to njee20 they are trouble free and roll better than the Hope pro SP3's
I didn't say they didn't roll better than Hope, I said Hope were lighter, DT roll better. And Kings are known for needing regular TLC and having terrible seal drag, it's the penalty you pay for decent sealing. Sadly, they're not all that well sealed either! I had a bearing seize in mine. Admittedly you can pop the seals out, clean and regrease the bearing and you're away, but considering the price it's not great!
I wouldn't even consider another set personally, although I know there's a lot of die hard fans who will tell you they're the best bike part ever and they cured world hunger and they now go 349mph quicker up every climb because of the instant engagement.