While the Omnipod system is highly regarded for its convenience, it does possess certain downsides that users must consider. The primary disadvantage is the reliance on the disposable pod, which can be expensive and creates significant plastic waste, as each pod must be discarded every three days. Some users find the adhesive used to attach the pod to the skin can cause irritation or allergic reactions in sensitive individuals, requiring additional barrier sprays or tapes. There is also the potential for "pod failure," where the internal mechanism malfunctions, leading to a loss of insulin delivery that requires an immediate, manual replacement. Furthermore, since the system is a single, integrated unit, if it fails, the entire insulin reservoir is lost, unlike tubed systems where only the tubing or insertion set is replaced. Additionally, the reliance on proprietary controllers or specific smartphone compatibility can be a frustration for users who prefer more open-platform device integration.