I just received Buried in the Bahamas and The Sinking of C'thagn in the mail and, via email, in PDF.
Reading Bahamas right now, in preparation for running a game later this month. So far, it looks pretty good, if also very basic. It looks like it'd work great at conventions, as Luke Stratton even talks about moving the climactic encounters to whatever island the players are on, if time is running out.
The Sinking of C'thagn is a large two-sided map (for oldsters, it's so large that it would be unreasonably large for a map in your car). On one side is a very nice, but simple, map of not-R'yleh. The other side has a simple adventure with rival factions (including a new one of oyster men that I wish had pre-gen stats and maybe an illustration), a Mork Borg-style set of psalms that lead up to the city sinking back beneath the waves once more, a few points of interest, and a small dungeon.
But the form factor is kind of a problem: In hard copy, flipping over this enormous map to show the players who will inevitably want to look at it periodically is going to be a pain in the butt. In PDF form, all of the different "pages" on each fold of the map are on a single jumbo PDF page that users have to scroll around to look at, instead of being broken up into eight or so long skinny "pages," which would be very easy to navigate. It's otherwise a neat product, including a Great Old One generator I can see using in other games.
I get that there are a lot of indie game types who enjoy playing with form factor -- Phillip Reed's almost monthly Kickstarter projects often have pretty eccentric presentation formats -- but sometimes, they get in the way of use at the table, IMO.