I got a question for you guys. I just bought a different boat that has a Lowrance HDS 12 at my captains chair and apparently, I need to put one of these 2 micro chips in my electronics to be able to see detailed contour lines per customer support from Lowrance. Wish I would of known this BEFORE I left on a 2 day fishing trip!

I fish in the midwest (Iowa, South Dakota) on lakes the majority of the time but do an annual trip to Erie every Spring.

Give me the pros and cons to each...

Thanks in advance.

FF