I've now done two three-waypoint journeys and am definitely down to do many more. What I love about Journey is that it provides the framework for an extremely intense exploration of an imaginary setting. The journeys I've done are actually for meditation purposes: to build up and make real a peaceful place in my mind that I can retreat to during meditation. And each journey enhanced that setting strongly because the prompts encourage you to explore specific sensory, psychological, historical, etc details. And details are what really flesh a place out.
For me, this game is a workout! I can only do it every once in a while because of its intensity, which makes it a nice break between lighter journaling games I enjoy.
I look forwards to using the expansion prompts as well (for cards, on black suits pick the original, on red suits pick the expansion).