Selling point is the way it refracts light makes it virtually invisible under water.
I could be wrong but I think it’s supposed to be more abrasion-resistant than mono also.
Downside is it has a high degree of memory and if you don’t spoil it properly it can make for pretty serious birds nests.
I went for the half-way; I run braid (which is super strong for its diameter and resistant to abrasion) with a fluro leader.
