Having used a Delta 20T from Kayak Las Vegas on several trips through the Black Canyon just downstream from the Hoover Dam, we focused on that make/model when looking at a tandem this year. Being that I'm 6'4" limited choices somewhat, but we looked at all other current comparable boats. Based on fit, finish, and quality of construction this was still our best choice.
This is an attractive, well made boat. There's plenty of room in both cockpits and they're far enough apart that you won't experience paddle interference - what we presume to be the cause of a 'divorce boat' - if you're not in perfect synch. Most importantly - this thing moves. It surely weighs more than a single, but not much, and with two paddlers you'll leave singles in your wake. It's stable and it's seaworthy. Four bulkheads assure a larger degree of safety over many competitors. Check one out before buying another tandem.