This letter is to express our sincere thanks for your help in renewing our Gost certification.
I was very impressed with your professionalism, communication, courteous manner and excellent spoken English.
Most of all, we are very grateful for the speed in which you processed our renewal. This has enabled our company to proceed with sales uninterrupted, which is a huge benefit to us and our Russian customers.
I would have no problem recommending your company to others. It was my pleasure.