Yea I had my car registered in FL because that is my home of record and I am stationed in DC for the time being. I had it installed at a midas shop under the table so to speak, somehow I think I got ripped on the deal because its all bolt on and took about 30 mins to do but they charged me 100. Average labor I think is 70-80 an hour. Anyhow I was one of them that had the problem of the rattling and still do. Someone did say just to add another hook to it but haven't got around to it yet, luckily it hasnt melted the plastic...lol Its only at real low RPM's that it rattles though.
Im not sure if it came with a hook, hopefully the guy didnt leave anything out. They're already broken in though, I have had them for a little over a month now so they should be fairly permanent as far as the sound goes. I know some people have issues with different exhaust companies having their mufflers go out but I've never heard of that from magnaflow, nor experienced it.