First of all, never had a company ask for full pay...

First of all, never had a company ask for full payment BEFORE their technician showed up at your house. Apparently it's a Groupon thing. The final report, which in my case needed to be on their letterhead with the completed work described, turned out to be a person email from one of the office staff. In addition, I needed a receipt for the work two days after completion and was told they could not provide the receipt because the check I presented was still locked in the technician's truck. Two days later?
I will give them credit for following up with me. Arocon sincerely wants to make thing right and they acknowledge hiccups in trying to satisfy multiple streams of business procurement.
All in all, they do nice work. Just make sure you communicate your specific needs and they respond to them.