Has anybody tried the Poly-carbonate filament yet?
I would have to say yes, since I printed out some of the Dual extruder I am building with it and was printing the lower fan parts for the dual this morning when I left. I had a few initial issues with it, but that ‘may’ be due to what I used had been sitting out for a number of months. And liking to absorb moisture from the air was in bad shape, but a couple weeks of sitting in half a bucket of silica gel packs worked better. 
Plus I had to convert back to the standard blower fan hot end cooler too. 