I like how simple yet effective this software was when trying out different methods for testing my applications' functionality during development phase versus final release/production stage.
This helped me identify issues before launch into production so that we could resolve those problems quickly rather than finding these errors after launching our product into market place! Nothing really since everything seems great overall but maybe more options would have been better such as having multiple ways you may test your app once ready? Maybe if there were some other tools available aside from what comes by default which are not very useful at all compared to others out there. Try doing an A / B comparison between 2 similar apps where one has tested features while another hasn't through integrated methodologies vs manual way. You will find huge differences in time taken plus amount spent per bug found and solved over both scenarios.