I have both. If the lakemaster map is HD for your lake it more than pays for itself. If not it will be a lake by lake basis as each chip has strengths and weaknesses and it varies per location on a given lake. Attached are some comparisons of the lakes I fish most. For Lakemaster Lanier/Allatoona/Carters are High Def & Guntersville/Hartwell are Enhanced Def. For Navionics all maps are from platinum chip.


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Guntersville

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Hartwell


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Carters

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Allatoona

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Lanier