I will say this if you are looking for a no frills stand alone sonar GPS combo that will not network with any other electronics, then I say buy it! It has proven to be an excellent, easy to read sonar unit which is mostly automatic and tunes itself to the water depth. It marks fish well and perch exceptionally well the down vision works well also but the jury is still out for me to state it is useful on the lake for walleye fishing unless in the rocks. One thing missing on the GPS is tracking. I say that without knowing for sure whether or not there is that function in the settings that allows for tracking. But I did add a Hot Maps Premium East card to the unit. In all reality it is exactly what I was looking for, a unit that does not require an engineers degree in computer science to operate with several different menus to keep you busy. It is a turn it on set it and forget it unit. The screen clarity, brightness and viewablity will blow you away and it is easy to see in direct sunlight.