Yep, all those reasons, except for the gooseneck ball. It was installed in my truck when I bought it.
As for having a flat bed when not towing, it took me just a few minutes to remove the four bolts holding the rails when I didn't want them in the way. No problem at all.
The main reason I went with that particular Husky hitch was that is was on sale at the time, for a considerable saving. Saving money was a great deal more important than any consideration about the in bed rails.
I made a spacer out of 2 inch lumber so that I didn't have to remove the rails when hauling my 11.5 foot slide in camper.
