The price that is given to a specific customer. The level of support, the ability to customize as per customer needs. Nothing so far. It is a great tool to use and can be upgraded to any level we want. This is a great tool to use, for a company to use it's the ability to upgrade from time to time, not a problem. The product is very well and is working great. I am using burki technologies since one year and i can say that it is best platform for my client. It's easy to use and support. It has everything you need for your business. I like this software because of its quality and support. Nothing to dislike about this product. Highly recommended. Support is fast and good. I have used this software since last one year and i am satisfied with its performance.