I have the Lowrance H2O loaded with Hot Spots Maps and it is the gratest thing since sliced bread. Screen seems to be a bit larger than most other brands I have seen. Screens load fairly quickly and you can purchase the Map create software and have detailed topo and street maps all over the world. I purchased it in the spring and use it in my car as well as the boat. You can buy the unit and the Map Create software for around 300.00. The Hot Spots Maps will cost another 99.00 at BPS.