Looking for a rollbar for a convertible that doesn't restrict rear seat access (2 kids) or front seat movement. They claim this does the trick (using the street version without the cross harness bar).
Obviously, there is no definitive answer. I'm WAY more concerned with a rollover situation than a strapped in child's restraints failing and them hitting their head.
I think all the people citing the similarity with Jeep Wranglers are correct. If having a padded rollbar was an issue, massive lawsuits would have put that vehicle out to pasture decades ago.
Of couse, my opinion is based on a 4 point bar without an added crossbrace (used for harness or camera mounting).