I just sold all my Navionics Platinum South cards to buy Lakemaster Plus cards for my Humminbirds. Up until this boat, I have always used Lowrance and Navionics. With the ‘Birds though, I prefer Lakemaster Plus as long as your main lakes are in HD. The latest SE version has a lot of new HD lakes in AL and GA.
The lake level offset, and many other Humminbird tools only work with Lakemaster.