I purchased it used with only 15,000 miles on it in Utah and drove it back to Wichita, so I got a good overview of it on day 1. I drive fullsize trucks and Vans for work, and everytime I drive my expedition I'm impressed by the ride and overall driving experience. I've put over 10,000 miles on it in 8 months.
The Good:
As said above, I like driving it. 4 wheel independent suspension has much better road manors than any solid axle setup.
The customizable dash readouts are nice, but limited.
The seats are comfortable, and the 3rd row is easy to use/store with good cargo space.
The engine is quiet, powerful, and overall smooth with only a little V6 shutter at idle.
The Transmission is a workhorse, between personal and work vehicles this is my 5th torque shift and I've had good luck with all of them.
4 wheel drive works well, and 4 auto is decently smooth on engagement in snow/ice.
Towing a 5,000lbs enclosed trailer on multiple highway trips with no issues other than more than expected feedback from the trailer. I've towed the same trailer with 5 vehicles and the expedition is the only one that I can feel the trailer in the steering wheel. It's not a bad feeling, but the slight way the trailer sways on the highway is noticable with every vehicle in the mirrors, but I can feel it with the expedition. My wife can't tell any difference though so I might be overly sensitive to it.
The Bad:
The ride is quiet with just a slight wind noise from the front doors, I only notice it if the radio is off. Now if the front fan is on high there is a loud air leak at the back from the air escaping, it goes away if the back vent windows are opened. I'm going to investigate this further, I haven't checked to see if this is a common issue.
Fuel Mileage: this is the HD Tow package with the 3.73 rear end. I can get 17.5mpg highway at 70mph without the trailer. It's not awful, but I was expecting a little better. Pulling the trailer I get 10-13 depending on the wind. It could have had a higher 6th gear, it could drop 500 rpms and still have plenty of torque for moving down the highway.
Noise in the front while engine is cold, turning to lock, and hitting a bump during low ambient temperatures. I need to get it flashed so the hubs stay locked for 5 minutes after startup.
The first oil change causes some wtf moments.
No actual engine temp on any of the dash readouts. Just Low/Normal/High. They do give the actual trans temp though which is nice.
Wear items replaced:
Factory tires when I got home because they were almost 5 years old according to the date code.
Factory battery because it was leaking and causing lots of corrosion. I've made it a standard practice to put AGM batteries in everything I own because they don't leak.
Modifications:
Bug/rock guard.
Weather Tech mud flaps.