When Nano came along I thought it was going to be the cat’s meow. I have used in in 2, 3, 4, and 6 pound sizes and they all have their little glitches.
Most all of the nano that I have used has surface fraying issues. ALL of it will freeze if you fish open ice when its lass than 25 degrees. If the line shows signs of fraying or shedding and its cold, things can get frustrating.
I’ve never notice a difference in hits that could be directly attributed to fish seeing the line except possibly in Lake Superior when casting lures for salmon. Lake trout would hit lures tied directly to 6 pound nano with no problem at all.
I still have a pair of open water reel spools filled with 4 pound nano and use these when tossing lighter jigs, 1/32 and 1/64, without a float or if jigging a jigging spoon vertically. Casting with nano tends to be exceptional for distance but then I think the line is prone to wind bowing when a lot of line gets out and the wind is blowing.
If you are looking for a product that is high in sensitivity for feeling hits, this stuff may be it. Hits are very cleanly felt. Bow caused by wind or current seems to dampen the felt hits some, but you could still feel them. How much line is out and how straight the line runs from rod to lure seems to play a part in this, like the bowing acts as a dampener.
If you are going to use a float at all, don’t use the nano. If the float is adjusted by sliding, it chews the line up. If you are using knots or other static stops, they slide easily when you cast.
Personally I use either XL clear or Vanish fluoro in every instance with better all-around results and fewer issues. Considering the price of nano, the other lines are a way better deal.