What is the flaw of OPS?

Could you elaborate on the potential flaw of OPS, or the Operational Payment System? Is it related to its security measures, scalability, or perhaps its transaction processing speed? Understanding the specific limitations of OPS is crucial in assessing its overall effectiveness and reliability in the realm of cryptocurrency and finance. Are there any known vulnerabilities that could potentially compromise the safety of user funds or the integrity of transactions? Additionally, how does OPS compare to other similar systems in terms of addressing these potential flaws?