There are quite a few questions on this subject on different forums and Facebook etc. Here I`ll try to answer a few of them by making a short comparison. There is no way I can write in-depth (pun intended) about alle these options in one article, so this is more of an overview. I made the list below due to THIS THREAD on a US-forum for marine electronics. As you can see from the original one in the link I have made a few changes to give it more substance. Garmin - QuickDraw: + Very easy to use, it`s fun to see imidiate results on your plotter. + Free, as long as you have a compatible Garmin-model - Garmin only, what if you want to use another brand one day? - You can not alter the map, ie correct bad depthreadings or change the layout like boundaries (land/water), nor use the collected data except on a compatible unit. QickDraw on Garmin Humminbird - Autochart: + Full controll of privacy, it`s all on your PC. + You have more controll over the data, as it can be c