I used them for my STD. I had a lot of questions and when I called the people were very nice. They even sent me too many envelopes and when I called to question them (I wanted to make sure that I wasn't charged for them) they said it was their mistake and have fun with the extras. I thought it and apologized for the mistake. If you decide to order with them, just make sure that they send you a sample. Oh…also if you order a sample, they are just going to send you the paper. It will be blank. If you need/want more info. just let me know.