What's great about it is how seamlessly the mashup at the end fits together. Melodies from one song fit perfectly with melodies from another and they all transition perfectly except the slightly jarring transition from the Raindance line into the There, There line to kick it off.
I can see the way that it all fits together, but some parts just seem forced. Like repeating the airport and hospital part exactly as it is in "Dismantling Summer". Don't get me wrong, still love how everything fits together in the end. Still great songwriting.