Gord, I have not used the Streamer Express Clear Tip, but have used the Stillwater version quite a bit. Great line for fishing streamers or wet flies in low water in the tailwaters during high sun. It still puts a shadow over the bottom, but with sized down tippet it doesn’t seem to alert the fish as much. I usually use about 4 feet of 6 pound test for a leader in really difficult conditions.
The one annoying thing about the line is it tends to get sticky, especially after you clean it with the abrasive pad the first time. Perhaps the streamer express version is different. I think once you clean it, you need to faithfully clean and re-lube with a silicon based lube.
Would be interested in your thoughts (or anyone elses) on the streamer express clear tip if you wind up getting one.