I have a Garmin, so the only option for me is Lakemaster. I agree that Lakemaster has a better product, but it gets expensive.
I wish I could have got a navonics chip for my garmin (navonics doesn’t make anything for a garmin.) For a Lowrance GPS, a $150 would have gave me a navonics chip with much of the Midwest region. With Lakemaster, you have to buy every state that your going to fish and its about $100 for each state. 