We were on the Eastbound but here's my two cents. We were on deck 2, ocean view, port side. On the EBPC, the port side is land side as you cruise daily. So for the WBPC, the starboard side must be the land side. We could see hazy views of Central America some days in the Pacific. Going through the Canal, there is no way I know of to know which set of locks you will be in so picking a side based on that seems pointless. We did think it was fun to go to the cabin when going through a lock because deck 2 was well below the surface of the lock. We divided our time between the top deck, deck 4 and our cabin, since you spend hours transiting. And we went from port to starboard regularly, too. I didn't see any advantage to cabin side during Canal day, only a slight one on the way down. Others will possibly disagree, but we spend most of our time on deck 4, which ever side is shaded. Hope that helps.