Real owners rate these about evenly: 84% of 112 Big Agnes Copper Spur HV UL2 owners recommend it, vs 80% of 10 for the Kelty Late Start 2P.
Verdicts aggregated from Reddit, enthusiast forums, and YouTube owner comments — affiliate reviews excluded. Sample sizes differ; judge accordingly. How we score
“Big Agnes Copper Spur HV UL2. Upgraded from Marmot Limelight 2p (which is still awesome btw) but saving 3.5 lbs makes a huge difference.”— thatonedayinmay on Reddit
“Get a Big Agnes Copper Spur HV UL2 Bikepack and forget about it. I just did a 8,571-mile cross-country moto trip and camped most of the way, and my Copper Spur was incredible in all kinds of weather.”— lowfox on Reddit
“I’m currently in the older model Big Agnes Copper Spur HV UL2 and am looking to get something else. Every sleeping pad I use in the copper spur sounds like a rubbery balloon squeaking as it rubs against the floor. Not ideal for anyone else sleeping nearby.”— bb-backl8er on Reddit