Duets with S&S were a bit rare. Burley discontinued the couplers a few years ago and then of course discontinued tandems/bikes this past year.
The Duet is a nice riding bike but not as quick handling or as light as a Co-Mo. Buying a pair of cases (new or possibly used) would solve that issue.
Yes, have ridden Burleys and Co-Motions. We've always opined that Burley was the 'biggest bang for the buck'!
Pedal on TWOgether!
Rudy and Kay/zonatandem