I often wonder who pays for his services when most of it you can either do it yourself for very little money, or go with another of the many companies out there that are a lot less expensive, he demands to get paid in advance.
I've only used one this companies to incorporate a company in Hong Kong and then open a bank account, I managed to open the bank account on my own 4 weeks sooner that the company I hired, there are very few cases in which you would need to use one of these companies, most of the time you can do it yourself faster and very cheaply.