We use verotel pro for quite a few of our sites, its great for volume sales as you get kick ass low rates. Their admin system is kind of outdated, but they bill and rebill really well plus for non usa webbies its great to charge in GBP or Euros, we have never had an issue with payments ever. There as safe as any other decent 3rd party biller. I just love seeing those £20.00 join email alerts coming in
