Every so often, Twitter surprises me. When you think you've had enough of the consultants, snake oil salesmen, link baiters and spammers, someone uses it to blow your socks off with great customer service. Drugstore.com just did that for me.
I make maybe two large orders a year from drugstore.com which is based in the US (and owned by Amazon I think). The main purchase is a generic OTC medicine which costs a ridiculous fortune in Ireland in branded form.