There are lots of options for cages out there and you have to be careful and really put thought into your intended use, street use, safety for that what if moment, looks, off road use where it will be used often bumping off obstacles etc. The basic old school roll bar provided protection in a roll over for the front passengers only so long as the tub it was attached to was healthy. Next bump is the family roll cage, it provides a little more body rigidity and provides a rear hoop for the rear passengers. Then you go to the next step of a 6 point, this gives even more protection but with compromise, it means dealing with glove box interference, foot well intrusion, some have been carefully bent to provide easier access and less intrusion while others are more robust providing seat mounts, door bars etc. If you go the latter route, you need to tie it to the frame to truly be solid as others have mentioned. My personal bronco has a custom cage from Nicks Trix, it is non intrusive and tucked as I plan on leaving the top on so I wanted protection in the unfortunate event of a roll over but I also wanted 3 point seat belts. Now the cage is well built however I would not rely on it if I were an off roader and was going to be using the cage literally as they do in that world, it is not tied to the frame and I would certainly want seats tied into it etc. So there are many different levels of protection and needs out there. For my customers right now, they are street cruisers so we are using Krawlers Edge cages which is a 4 point rear but has 2 upper bars that tie into the windshield frame. Its biggest bonus for me is it leaves the eagress wide open and if something failed on the AC and I had to pull the dash, I do not have to pull the top and cage to get the dash out. The windshield frame offers no support but also having the DOM tubes tie into it will lessen the chance of it folding in on the passengers which is sufficient for my present customers needs as well as it makes the windshield rigid for running a soft top or bikini top. Bottom line is really put the thought in and get the result you will be happiest with. There are many options out there and all are good for their intended design, just make sure you pick an appropriate design to meet your intended use. If you go full on off road and tie the cage to the frame you get a very rigid vehicle but it also rides that way...