Couple weeks ago I sent documents for tax return to IRS using Pony Express. It was cheeper than with DHL so I thought it was a good decision. How wrong was I! They picked up documents very fast and I was sure my papers are on theit way to Texas, however they called my after a week and send that I need to provide them declaration for Russian custom service.
In addition they asked me to sign the contract with UPS(!) and print six(!!) copies of invoice. So I filled much more papers then I send and another courier picked them up.
Then, same person contacted with me to say that I need to send my ID separately from the tax form because of the border service requirements. After it I asked to return my documents and they suggest me to pick them up on my own, otherwise it would cost my extra money and took some time. So I fought with evening traffic driving from east of Moscow region to the south.
Same package arrived to the US via DHL in four days without any custom documents from my side. Next step would be is taking my money back, they are talking about 1-1,5 months. Looks like the Pony needs some rest, because it too slow!