A recent article was published comparing two procedures, in which one is called the transobturator and the other one is called the retropubic. In my experience, both of them are almost equal in their success, but transobturator approach has a lower risk of bladder and bowel injury.
Also patient selection is very important in minimizing these complications in the retropubic approach. And surgeon experience is very important. That is why you need to utilize the expertise of an urogynecologist or somebody who does female urology.