I've only played once, but it didn't seem to bad.
There wasn't very much player interaction, but a person's moves certainly affect everyone else. If you spend too much time collecting crystals, then the other players will get all the cheap spots on the obelisk.
Player's choice of where to recontruct can have an effect on your plans, as you have to make a choice. Do you try to cash in on their project, or do you try to get another project all to yourself? Also, the amount of dragon scales that everyone else has collected will affect your plays.
So while there isn't a lot of player interaction, it is certainly a lot better than Alhambra, for instance.
Again, this is only after one game, so don't pay to much attention to it.