I've used similar set-ups in saltwater. You must use a stripping basket!! 100' of running line gets very tangled very fast. I've never used it with a poly leader. My shooting heads are all sinking so I would not want a floating leader. Using a 9wt you can easily cast 125'. Perfect for saltwater shore beach fishing. Careful when a big fish hits short line, the running line can cut your fingers if your not careful getting the fish on the reel.
The man who coined the phrase "Money can't buy happiness", never bought himself a good fly rod!