* Did not try to sell me anything extra
* Answered all of my questions clearly and concisely
* Provided an unlock code for my phone via email so that I can get a US pay as you go card (as that looks like my cheapest option for co-ordinating things with US folk while I'm there)
* Told me the essential bit of info I need to make a note of in case I need to claim for my phone on my insurance, which I didn't know about and therefore don't have noted down anywhere
And was all together eager to help and make my life easier.