Just wanted to post a huge thumbs-up for what I think is my favorite all-time 2-person tent, and I've owned a bunch of tents in 45 years of backpacking. It's early because we've only used it two nights and in dry (but windy!) conditions, but on a comfort-to-weight basis, this tent is fantastic.
Measured at 2 pounds, 13.0 ounces, this tent is not "ultralight" by any means. I own and use a zpacks hexamid solo+, weighing in at 16.0 ounces total, when hiking solo and in gentle climates. But with my wife, we've been using my older BA fly Creek 2, and while this is a fantastic traditional (double wall, free standing) solo tent, it is cramped for two. So, given our fly creek is many years old with 100+ nights on it, we decided to go ahead and try the BA copper spur.
The copper spur 2 is not really much larger in terms of floor space than the fly creek 2, but the walls are essentially vertical making more volume, and with two entrances and two decent sized vestibules, it affords a whole lot more comfort for two than the fly creek, at only a few additional ounces.
Definitely recommended; I know, darn expensive (but we get a pro-deal with BA...), but worth a look for those wanting pretty darn light tent for two, but in a traditional double-wall tent. We plan on using this next spring on my wife's AT section (GA->Harpers) for when I'm with her (and she will use my zpacks when I'm not).
Pic from this last few days' outing: