Is Sikuli apt my requirement ?

I need to automate UI manual testing for a windows application, the application has 10's of sub menus and functionalities. If I prepare all possible test cases(UI) it would around 600 ( assuming ). every testcase could be achieved with the current sikuli functionality. My question is If I develop these 600 test cases individually and integrate with unit test. will the resultant script will be stable and reliable as it was for single test case ( assuming that I haven't done anything wrong ) ?