Like ABCD's reply, I use(d) that cast in smaller streams wher OH casting is not possible and more often to get underneath some overhanging brush. It works best for me with a medium action rod, (e.g. more flexible Vs. more stiff) and tyically with a shorter rod on small streams, say not more than 8 Ft., typically with a 5 Wt. line and fiberglass rods, way back when!
With today's rods being much faster, I would suggest that this cast needs a lot of practice. There are alternate casts that can be used in tight quarters that I think do as well, something like a mini roll cast or spey style cast now works for me and are easier to do. New lines that have a shorter & heavier front taper, I call them WFFF, also help with the slingshot or B&A cast, something like a cut back S/A Headstart line taper.
Pete AKA Frenchcreek from Calgary