I have this line in almost all the combinations available. I also have a number of other brands of line which I use for musky, but these are my most favorite lines for my 10wt. I also use the 300gr intermediate running and 350gr floating running lines on my 8wt when I fish the river with current. I need to get down into the zone and fast. I also use it in lakes for bass which are going deeper during rapid weather changes.
These lines are very smooth to cast and the 18 foot sink tip certainly helps me to keep the fly in the zone without following the running line too much.
One big advantage the sink tip lines give me is when I drift downriver I can quickly get the fly to my target spot, strip it back few feet and make my next cast.
Do not let the price of these lines make you think it is inferior to other brands. They are excellent and perform very well.