Pros for this therapy

ERP can cause some short-term anxiety and severe discomfort. Patients may feel very uncomfortable as they are initially exposed to the negative triggers.

ERP is highly effective when administered properly. When effective, it should produce weekly therapeutic progress. 

Cons for this therapy

ERP facilitates long-term reduction in obsessive and compulsive symptoms.  While, patients will initially feel short term anxiety and discomfort, the negative feelings will decrease. In the long run these feelings are helpful for the patient in his or her fight against obsessive-compulsive behavior.

Incorrect application of techniques can lead to failure of the therapy, and inconsistency in treatment can cause regression and setbacks that are difficult to overcome. Patients who do not have a specific behavior that they want to change and address might be better suited for a different type of psychotherapy.