Hi Loren, The best addition that we made to our Edge was the installation of a Fantasic fan in the washroom vent. It is head and tails more efficient than the small fan that is standard. We also added a second battery, but since we probably wont be boondocking on purpose, that addition was probably a waste of money and weight. We also installed a Reese sway control WD hitch, and the Edge pulls like a dream. You will find the AC loud but effective. We purchased a small heater, and have never had to use the furnace yet. A change was made to the main door, where a plastic clip to hold the door open (and didn't work well) was replaced with a hydraulic closer. If yours does not have the closer, check a newer unit at a dealer so see how it works. I am sure that you can get one from Heartland or maybe Lowes. You will find the Edge to be a very well designed trailer, and we are very happy with ours.