I make a new, difficult website with 20.000 products with different discount for shopper groups and with lots of customs fields. I bought CSV Andvanced and I used, but I didn't found some functions. I spoke with Dinh Truong Giang by Skype and he quickly said the solutions. When some special function didn't work in CSV, he repaired the program and made a new program version. I can use the CSV perfectly. I think, this is a very good program with excellent support. I'd like to say great thanks for his help.