It's very easy to tow once set up correctly.
We have a 2015 Manual Pro4X
1. Leave the Key in position 1. This unlocks the steering wheel but doesn't turn on the battery.
2. Make sure transmission is in neutral
3. Make sure parking brake is off.
4. Make sure it is in 2wd not 4wd or you will be screwed.
As far as tracking. With the right towbar and towplate set up it tracks just fine. Since it is on all 4 wheels you don't get a tail wagging the dog situation like you might with a boat trailer. Since it is supporting it's own weight on it's own suspension there is no tongue weight on the tow vehicle, other than the weight of the tow bar.
When you turn a corner the steering turns on the X and it follows right behind. It tracks slightly inside on turns just like anything would when you tow it.
You can not back up when towing 4 down. The X will try to go the wrong way and if you are lucky things will just bind up and stop. If you aren't lucky you'll be buying a new towbar and maybe tow plate on the X.
You can pull the X with a towplate. You have to remove the factory tow hook to mount it, but the tow plate is very stout and I believe I could hook a snatch strap to it, if I had to in an emergency.
You can also have the towbar modified to pull on the d-rings of an aftermarket bumper. So then you can have your winch and all that too! I'm probably headed down this road.
The X is heavy so you have to have a braking system installed. If you look on our site you can see the system we went with. It is difficult to install, but once installed it's plug and play and we don't ever have to do anything special other than hook up our normal cable that makes the turn signals and brakes work on the X.
As far as pulling it. Like I said it's heavy and the larger AT tires have some drag to them, so you can feel it more than I felt my Mini Cooper back there. I used to tow it with a 32,000 pound 400hp diesel motorhome. Now I tow it with a 20,500 pound gas motorhome. Both handle it well. When we get back to colorado with the steep uphills and high elevation, I will probably take the X off and have my wife follow me on the mountain passes, just so I don't strain the gas RV engine too much.
All in all it's been great and it takes us so many cool places we couldn't go before.