The problem for me is the valves are under the couch , and that cant be accessed without opening the rear slide bed. So, i have to remember to set the valves the corect way before heading out. I usally dont and then have to bring water in by jerry can and fill it through the inside siphon. Plus, its not one valve to fill, there are 3 and they move a lot to go from filling to pump to city water. Good thing I mostly camp with hook ups. Lol. I dont know why they wouldn't have a gracity feed, or an easy way to swap the sytems over. Other think is the tank is not visible, and its insulated so i can not determine how full it is. Yea, the sensors, they never worked since i got it.