Think semi truck of the rafting world.
They weigh a ton, haul a ton, and take a ton of abuse.
But, they are a ton of work.
Rowed em on Deso. upper Colorado (cargo hauler for a really big group) and once on Dolores; we dredged a new channel
Unless you're in Cataract or GC sized stuff the ride is boring. In wind and at put in and take out they will teach you new swear words.