We also love the REI Quarter Dome 2 but it didn't win any awards in this last round of tent testing. There is just much more competition in the two-person tent line-up and the Quarter Dome 2 doesn't stand out from the pack in either weight or price. At $349 it's only around $50 less than some of our top-rated tents. By contrast, the Quarter Dome 3 with footprint ($60, sold separately) is $120 cheaper than the Copper Spur 3 ($166 less expensive if you join REI).
We fit 170 pound guys ranging from 5'10" to 6'2" in this tent comfortably. The vestibule is fairly generous. When in fast fly mode, there is still plenty of room around the edges to put your packs and extra gear (which helps further enclose the tent and block the wind). We highly recommend extra garbage bags and trash compactor bags so that you can put your gear up to the edges and keep it dry.
This tent is above average for weather resistance. It has relatively sturdy poles and fly material that, when properly staked, stays put in strong winds. There are ample guy points, but you will likely have to buy more guylines; we recommend the Kelty TripTease. You will likely also need more stakes.
The photo below shows how much area extends beyond the footprint to store gear whether you are in fast fly mode (shown below) or regular mode with the tent body.
Weight and Packed Size
The Quarter Dome is not the absolute lightest in our fleet, but it's about as light as you get for the money (for three people). The entire weight is 4 pounds 9 ounces for all compontents; however, if you camp in the "fast fly" mode, with only the fly, the weight slims down to 2 pounds 12 ounces. Only a few free-standing tents are much lighter, and it's usually by only a few ounces.
Ease of Setup
The set up is not intuitive at first. After a few times, it becomes relatively fast to pitch with 1 or 2 people. There is a distinct order of operations. If you do things in the wrong order, you have to do it over.