Comparing KIM to TVT Exact Sling

To assess to the non-inferiority of the retropubic Neomedic Knotless Incontinence Mesh (KIM) sling compared to the Gynecare Tension-free Vaginal Tape (TVT) Exact sling. Participants: Women 21 years or older with a diagnosis of stress urinary incontinence (SUI) or mixed urinary incontinence (MUI) with objective evidence of SUI planning surgery for stress urinary incontinence. Procedures (methods): Patients will be randomized to receive either the Gynecare TVT Exact sling or the retropubic Neomedic KIM sling. Patients will be followed for 1 year postoperatively.