Two questions:

(1) Why the short list of airports? This seems like it would be of interest at any west coast airport that has Hawaii flights, or any east coast airport that has Caribbean flights.

(2) Why the cap on the length of time in in the connection? Honestly, if I'm going to do this at all, I'd rather have 8-10 hours on the ground, or perhaps even more. Enough time to get to a hotel, get decent sleep, and come back to the airport. I get that some people might love the shortest connection time possible and not leave the airport, but why not offer other options? I know you can always book it and then do an SDC to get an earlier first segment, but I wish the software let you book it that way to begin with.

In any case, I won't go out of my way looking for these but it's nice to see options being added. Especially given that other airline systems figured out how to code for this long ago.