[sapphire_tomb]

Interestingly I tried both those airports as they're the ones I most frequently arrive at when flying in to the US. I'm not a US citizen, and the lines for immigration at both of those airports take me a couple of hours usually, so I'd have happily stumped up for this service. The quote you offer for both says they do NOT include expedited immigration/customs however. So is your site broken already or what?

Edit: I see from other comments in the thread that you do this at JDK/MIA by having one of your agents stand in the queue ahead of your customers and then letting them cut in when they arrive. The British in me finds this abhorrent, and there's no way I'd do it.