I prefer the platforms because I have a couple bikes with non-structural tanks I couldn't hang them from and I like the minimal paint contact, but I have a cheap one. It does the job and is rated for, IIRC, 75 lbs./bike (2 bikes), though I wouldn't trust it for anywhere near that rating. There's a reason that the good ones are so expensive. If possible, I'd also try to get a 2" receiver as my 1 1/4" (biggest that will fit on my car thanks to the goofy center exhaust) wobbles a little and, of course, the 2" tubing that would go with it would just be much stronger.