The whole line of RE batteries looks interesting. The warranty
PDF is worth reading if just for what it doesn't include and the tips on maximizing battery life - those are good for any RV battery.
The 5 pounds and longer warranty for same energy is pretty much in line with the capacity, longevity, and cost triad of trade-offs, too.
I wonder what Trojan considers proper use as indicated in the warranty. I notice they don't publish the cycles rating in the specs.
It will be interesting to see how the Firefly battery project compares, too.