The simplicity of use is the best thing about this software, everything related to running the day to day operations like billing, inventory management etc. is very simple and easy. You can configure all the accounts as per your requirements but I feel if they could integrate more payment gateways it would be really helpful. Other than that there are no issues with merchant. For office operations it has been the easiest solution for us in terms of managing our accounts. We have a lot of accounts which were difficult to manage earlier but now with merchant it has been so much simplified.