I rear-ended a Civic with the Jeep and ARB bumper. Really wish I had a picture lol.
Both rear quarters, trunk lid, rear glass, all rear lights and the sheetmetal around the trunk on the Civic were mangled. Two small scuffs on the ARB. This was 10MPH crash, MAYBE.
I had no issues with the police at the scene, in fact they laughed when they saw what happened. My insurance company didn't have an issue either paying out $6k to fix a 1998 Civic. My insurance does know what I have done to the Jeep and they have pictures of it.
In low speed and against soft objects (read animals and people), it will hold up much better than the stock bumper cover or a brush guard. At high speeds, its still going to bend and damage the frame, but it will protect you more. I hit a tree dead center with my old Jeep at maybe 45MPH. That crash snapped my winch in two, bend the bumper out, bent the rebar in, sheared the motor mounts off and pushed the engine back a few inches. I walked away. If I didn't have the bumper, I probably would have bled out from the engine coming through the firewall and winding up in my lap.