Even though the vests don't have a one-way locking system any more, they're still sprung loaded, and press down to take away all space between you and the restraint. They may have solved the comfort problem, and there are rides where I don't really mind them, but they completely ruin dive machines by removing all airtime and rendering the drop completely forceless, unless you're prepared to deal with the discomfort of holding the vest up against the bar to keep it off your torso and shoulders.
It seems like B&M have figured out how to make interesting dive machine layouts in the last couple of years, yet I have no interest in them with these restraints. I'm afraid they're all getting filed under "meh" until they find a better solution. Valkyria has the best dive machine layout I've experienced to date, but the vertical drop may as well not exist.