It looks interesting. Here are a couple links I found on avsforum. One is a nice write up in the NY Times and the other is a legnthy discusion from about a year ago. I'm sure there are other threads on there.
🚢 Cruise with your favorite Keene Luxury Travel Staff Member! 💰 5% KLT Reward plus Shipboard Credit available (amount varies per voyage)! 💲 Offering Enhanced KLT Rewards on voyages hosted by Ngaire & Clay!