A few months back I bought a Helix and Navionics Plus. By no means am I an electronics guru, just ask Rickie how many text and calls I've made to him for help since buying my unit. That said I love mine and need to do as Rickie says, leave the polls at home and make a trip to the lake and make it an educational trip. I've seen some units on some of the other boats and how they operate. Most all do the same thing just in in different ways, touch screen, hitting buttons. I think its something you should try to see one operate on another boat, pick what you like, and what suits your budget, and roll the dice. The real education starts the first trip out and you hit that power button, the screen lights up as well as the smile on your face. Thanks again Rickie
Almost forgot, yes you can see the contour lines. I've only fished Barren since buying but assume all lakes would be the same.
Everything is possible. The impossible just takes longer!