I had about 3 hours of boat time yesterday. Finally!!! Garmin impressed me with no thoughts of wavering switching away from a different established freshwater brand. My GVC-10 SideVu and DownVu is excellent to better. Garmin's 840XS ease of use is more intuitive to operate and I only played with the units features for limited time yesterday. Also, I got caught up driving my boat. That was even more fun. However, gotta say LakeVu Ultra HD MaxDef mapping is rock solid awesome. No disappointment there. I have lots to learn with a different hardware technology. As I get more time on these units I'll share more of my experiences. Garmin is a serious freshwater player worth considering.