Compared to DCA long term it is just as close, inside, and about $11 less per day. The Hilton garage is very tight and hard to navigate. When I arrived it was pretty messy with trash on the ground, but it's just a parking garage. I did not use the shuttle, but it is 1 min. walking to DCA's terminal B and .4 min. to the closest metro. Overall easy and reasonably priced. Checking in and out was very easy, which was by concern.