We looked tested a many and the co motion just seemed to glide along. With others it felt like the tandem got in the way, but this thing went when we wanted it too and moved the way we wanted it to move.
Do any of you put tandems on trainers? We have the Primera sitting right in front of our single bikes (on trainer) so we can dream those countless hours away... would be great to get some time in on the tandem before the warm weather starts.