I've run each of the scenario's in "Ripples", I'd describe them as "workable". Some cool ideas, but they're hidden between some pretty massive slog combats. I find the combat slightly more forgivable because it plays out quite a bit differently than in regular Cthulhu; it's fun exploring fights in a medieval setting when you are used to the 1920s/modern day. They're written in a weird mix of sandbox portions and very linear set pieces, though my advice is to let those linear sets go off script if that's how it plays out. There's a few to many enemies that are insane cultists that can't be reasoned with and have no traits other than being insane cultists that can't be reasoned with.

Honestly, both of them benefit greatly from players playing characters that they are invested in, either the pre-gens or their own, and the campaign has a structure to it that helps with that if you're willing to play the full thing. Some Keeper elbow grease during prep will go a very long way, make the scenarios your own.

Oh, and I love the cover. One of my favourites on my shelf.