Chop/Low cage safety

I’ve been looking into a low profile cage for an XP 1000, an aftermarket one designed for racing. They look a million times better than the OEM top heavy design but I’m not gonna do it if it makes it less safe. I don’t exactly want to put the girlfriend into a coma if i hit a rut wrong at 60mph.

How safe are these things? Is there some guidelines as to how much room there should be between the top of a helmet and the roof?

What about convenience? Are they a pain to get in and out of for trail riding?