Conversion quality depends on migration type, direction, and source code features. Nearly 100% of tables and data are converted for most directions. Approximately 75-95% of SQL code can be converted correctly by the tool. When the source code includes mostly business logic, as in the case of COBOL applications, around 70%-90% of the code can be converted automatically. For an application with a GUI, the initial conversion rate can be lower. However, in such cases, the customization of Ispirer Toolkit allows to achieve 90% of conversion.