When this biner first came out it was my favorite. I instantly bought a bunch, put them on my rack and was psyched. That was about 10 years ago. Now the Trango SuperFly has more competition from the Black Diamond Oz Carabiner, CAMP Photon Wire Straight Gate and many others. The SuperFly still stands out as one of my favorites, but it is no longer the runaway winner.
If you want the absolute lightest weight biner, go with CAMP Nano 22 Carabiner or absolute smallest biner the Metolius FS Mini. But overall, I prefer the Trango SuperFly because it's fairly light, but still easy to handle.