Not sure what to make of it. It was certainly an interesting interactive experience - I'm not a huge fan of multiplayer, so having some random dude fizzing around beside me and warbling away to his heart's content was very weird; both anonymous and horribly intimate at the same time.
As a game, I thought Flower was better and that it had more transcendent moments; Journey is both less original (in the way of story and gameplay) and more thought provoking. Still mulling it over really.
In the course of my journey I met eight other players, which surprised me.