I like how well it seems built, nice and solid. Using it as i write this review. When i plugged it in the first time, it took about 2 minutes to run it's analysis of shore power pole, then it clunked and it was ready to go.. The only down side is the defender is a bit long for this shore power pole at this particular campground. As seen in the pictures, the trailer plug in is on the ground. Hopefully this is an isolated case.. Also you can see that i wrapped a chain around the box and the unit so creeping hands don't walk away with it. I also bought a lockin ball for this, but because it was on the ground, i could not use it. Will review that when i use it the first time..