Pro is Pro!
I had the original ShotGun and Handlebar on my old 26" Lapierre Spicy (Alloy frame) and it worked great. Very solid and relatively easy to remove when I want to ride solo. I used to leave the Handlebar on it, but eventually took it off and she didnt care.
After upgrading to the Specialized Enduro (carbon frame) It didn't fit as well. The down tube was bigger then top tube. As such it never really felt solid. Plus I was bit nervous being a carbon frame.
Luckily the Pro was released almost straight away. Couldn't wait to get my hands on it.
Initial fitment was straight forward, with the longest time being spent on adjusting it to be just right for my daughter. She was super keen to take it out for a spin. So we did.
I wish the seat was no-tool-adjustable forward and backwards though. Would make it quicker to adjust for different bikes.