Jackson Zen Medium - Outfitting

I am interested in buying a medium Zen, but don’t know a lot about the outfitting. It looks like it would be very easy to adjust, but has anyone had any issues with the backband or bulkhead cords slipping or releasing on the water? I am currently paddling a small mamba but looking for a boat that is a little bigger but still good for beginner/intermediate. Thanks for your feedback!