A pair of 172g Fuses, 1 of each flavor, arrived in the mail yesterday and I managed to squeeze in forty minutes of throwing time last night before dark. It was a bit breezy with winds 15-20 mph which, in combination with the short time frame makes for a incomplete impression but so far so good. Discspeed sums it up well stating that the Fuse is just plain fun to throw. I had not been using a disc of this type in my regular bag (as opposed to a Super Class bag) but that short forty minutes of practice made me realize just how much I'd been missing. Anhyzer and straight to anhyzer throws were a breeze to throw compared to the GL Core I had been using for this type of shot before. On an overpowered/overangled anhyzer throw, the disc seems fairly forgiving, not immediately diving groundwards (notably more true for Opto than GL). It looks like the disc will go dead straight but I need more time with the disc and less variable/windy conditions to comment on that. On mid to low angle hyzer throws, I was seeing a tendency for the disc to go from hyzer to flat and then back to hyzer again, fading out, though there's a fair chance this could be operator error. Shame my schedule for the next coupla days is so busy as I'm itching to get out and play some more with the new toys.
Opto vs. GL: With the Fuse, I'm favoring the Opto version for much the same reasons as discspeed. The one thing that the GL Fuse did appear to do better was crosswind though I'm not certain why that would be the case. The GL Fuse appears to have a slightly lower profile (less dome) but the difference is negligible. PLH between the two is identical. As far as my other Lat 64 discs, I'm using mostly Opto. I carry a GL Striker but much of that is dictated by shape. It's not as domey as my domey Opto and not as flat as my flat Opto. I was carrying Cores in Opto and GL but will be dropping the GL Core in favor of the Opto Fuse.
One more big plus for my Opto Fuse. It's in nice, bright orange plastic and actually can be seen from a distance. Lat 64 has put out some beautiful colored discs that can be utter bastards to find as they stealth into the surrounding terrain.
...there was a time when you were taught to find the best disc for you, not the best disc for your situation on the course, which is how they are sold now. IMO, the flight charts are basically there to point out all the stuff you dont have in your bag and why you suck.