I ordered some in a two week pool back in January. They came about 16 days later.
I have used them on a ticket and things look fine. I tried to upgrade the ticket and that does not look to work, but that was via the web, I will try by phone later.
Also, the true fare amount is NOT printed on my ticket receipt. I have a big fear that my accounting group is not going to look too favorably at this. I will try to snow them with the HOLD form from the web with the real basis on it.