I've just started running a second in-person Cache Refresh league. The first one was well received, but some of our local players didn't actually get decks made before it ended, so a second, longer one seemed like the obvious choice of thing to run next. This one will run for about three months.
We are using the bidding, because I think it's an interesting mechanic for running single-game matches that is worth experimenting with. This is one of the major reasons why I made bidding reference cards. No one has shown up with bid ten PE yet. I think most of us are still getting the hang of bidding. I don't think it's anywhere near as awful as some people claim, but I won't be particularly upset if it disappears from the format.
In general, people seem to be enjoying it. I think around half of the games played at my local Netrunner night the last few weeks have been Cache Refresh games. And I haven't even sorted out all the prizes for this round yet!
We've had increased attendance since I started these leagues, but I think that's mostly due to other things that happened around the same time - we changed locations, some of our players are done school for the summer, the standard meta is in a better place, etc.
I also played in FightingWalloon's first online Cache Refresh league. I enjoyed it a lot, though I do kind of wish I could have experimented with changing big boxes.