Bought this cab to go under my recent purchase of the duo 2x10, and having done countless hours of research, trawling forums etc etc, I can affirm that these cabs are THE BEST I have ever used, and I have used all the major brands at one time or another.
A manageable sized cabinet on its own, The Double is like all their gear built with the highest quality components and attention to detail, Like the doors that "clunk shut" on a VW or Mercedes this gear has that quality of feel about it....built to last a lifetime. The sound is focused, full, with a tight low end, the cab never even flinched with my B'String pumping through it at recent gigs at a loud volume. The tone is whatever you want it to be if you have a good head and good tone in your hands I challenge anyone with these things to be dissatisfied with this cab.
Absolutely killer when paired with the Duo, any style, the cabs are "reactive" to subtle dynamics, "lively" i'd say. If you have any flaws in your playing you won't hide them with these cabs, everything is there for all to hear, but never harsh.
Stop reading, just buy one.