User Review: Big Agnes Copper Spur UL4
Price Paid: $599
There are a couple of differences. The vestibules there are two and they are big. The vestibules have three positions and two stake out points. Closed is position one. You can roll it back to position two one third open. Last you can open it up all the way.
Most tent doors have a zip along the bottom and then one that goes up and around. This tent has just the up and around and it goes all the way around. You can roll the door up ant the bottom and secure it. Four mesh pockets are at the corners and there are four triangle shaped pockets in the celling.
The vents are the same as the UL3. Two vents that are held open by a rigid piece held in place by Velcro. Ventilation should be great lots of mesh. The floor is thin. I could see the grass below the tent in great detail (Purchase the footprint).
There are two poles. The big pole is a standard H pole red with a different hub than I have seen on a Big Agnes. The poles are red I like a high visibility color so you are less likely to walk away and leave it The other pole is a cross pole that holds up the vestibule it snaps into the H pole in a channel at the center of the H. Clips are the same as the UL3. The best I have seen on any tent so far.
Interior room is big big big. I am 6'1 and if you were much taller you would need to sleep length wise and that would change the capacity to a 3 man. I used my UL3 for a two man. The UL4 will be two adults and two children.
The only complaint I have with the tent is you can't zip the tent doors all the way to ground level. It leaves a lip of about three inches you have to step over to get in or out. If you stepped on that lip in the corner there may be a problem. It is reinforced at that junction.
I love my Copper Spur UL3 and the four looks like more of the same. That is why they call it the mother of comfort.