If anyone wants to see examples of the Lowrance mapping, go to www.lowrance.com/Mapping/NauticPath/default.asp (sorry, I don't know how to do links), they can be expanded. To me, being used to Navionics, they look rather confusing and 'graphic'.
Bob, I only got the small chart of Poole area with my 3500c but have now decided to go for the larger Navionics Gold, two of which cover the country.