I made it to my appointment in Massachusetts with 10 minutes to spare. My time estimate for the overall trip was nearly perfect. I didn't get to enjoy some of the cities as much as I had wished. Besides that, this 5 1/2 day road trip turned out to be a good experience that I'll remember very well.
Would I do a similar trip across the USA again? If I had to, yes. Next time, I may take more time to enjoy many more stops along the way.