When I first read this heading, my immediate thought was, "There are pros???"
A stretch and sweep is just an intervention and while less extreme than syntocin, for example, you're still causing your labour to begin before you know for sure your baby is ready. There are good reasons why babies are the ones who decide when labour begins since they're the junior partner in the duet and need to be thoroughly cooked before they come. If you're not in labour it is for a good reason - baby not ready or mature enough for life earthside, in a poor position for labour, that sort of thing. So starting labour before bubs is ready is more likely than not to lead to the whole cascade and then to forceps, epidural, ventouse or c-sec with its attendant trauma for mother and baby.
The only time I'd consider a stretch and sweep would be if I were 43 weeks from conception, not LMP, and with dramatically rising BP. Otherwise, like any other induction technique it's just too risky, IMO. Oh, and in the studies opinion too