Having used a Raymarine
C90 plotter on the last two boats I bought one for my current
boat, the new one came with charts
so I didn't bother with a Gold insert card as I had with the old ones. I was disappointed with detail so bought a card, only to find it was not the chart but the set up I had used. What I was told by the supplier was that all charts carry the same level of detail, its the extras, such as photographic or 3D that vary, so if you want them buy Platinum. I don't have those extras, but I find the system ideal for the Med with the usual and occasional anomalies that you get when the underlying paper chart is an old survey!