I designed BO Tester in order to create binary options strategies and experts for a trading company. They use the software and trade tens of experts on real accounts. As I know, they have a very good success rate and are completely happy with the applications. However, they are professional traders and can evaluate and choose strategies well.
I know they have plans of releasing real account statements and to sell BO experts and signals for several thousands dollars per copy.
They also request to stop selling the app because it provides opportunities for the traders to create their own experts.
There was slight discrepancy in the first version of the application, but after the change over to the native MT indicators, all noted discrepancies were eliminated.
We only observe now slippage and gaps in the broker's execution from time to time, but this is out of our control. However, the Monte Carlo tool is capable to simulate such distortions and this reduces the risks.
I also see that they trade on live accounts with experts that show bad statistics in BO Tester. They do that because they say they make money with this logic from years and rely on their experience.
There is also a human element, that introduces discrepancies. They have a group of operators that trade big volumes on different brokers manually using signals from BO Tester experts. However, sometimes the operators make mistakes.