We have a 2005 coupled Speedster with Wound Up carbon fork. Our other tandem is a 2015 Cannondale T2. Our experience is similar to other posters. I find the bike much more sensitive to stoker movements and is a little flexy. There is a reaction to sharp steering input from the rear. I dont dive into corners on this one. It was unsettling for me the first time we rode it-and this was before we had even bought the Cannondale. Since then it's been fine and plenty stable. We certainly are not limited speed-wise because of stability. Stoker says sometimes that it feels more solid and stable than the C'dale. For me, these are just different bikes that handle differently.