I just had a Garmin 93sv echomap plus and Panoptix installed on my boat. The maps are very bad. Ross Barnett lake does not have one foot contours or show the channel markers. Sardis Lake is about two thirds mapped. The Garmin Rep I spoke to said there are no updates for the maps. All he can do is tell enginerring to have the lakes mapped. I am glad I have two Lowrance units on the console. I hope the Panoptix works like they said or all of it is going back to Garmin.