Overall
The Fuse by Smith is one of my favorite goggles of all time. The optical quality is fantastic, they'll take a beating, and they look great. This is the goggle that doesn't look like you've got alien death-rays stashed behind the lenses, its just simple and to the point.
Performance
With a wide array of lens options from super dark to totally clear, the goggles are great in all light conditions. Vision is always clear, and fogging is minimal. They do fog from time-to-time, however this is usually when I'm hiking or shovelling. I have not found a pair of goggles yet that do not fog under these conditions.
The only downside I can think of to these is the air seal wasn't as good as the Prodigy. I felt a bit of wind coming around my nose into my eyes. Very minimal but noticable.
Design
The Fuse looks great in my opinion. It comes in a great assortment of colours and pattens. I like the squared off, simplistic lines of the goggles. They aren't trying to look too fancy, just straightforwards goggles. They sag quite well to for those of you looking to wear the goggles downtown.
Value
The Fuse are definitly high in price. However, the quality for what you pay is great. The goggles are MUCH higher quality than cheaper options, and are the same quality as other manufacturers where goggles cost exorbant amounts.
If you're looking to invest in good goggles, the fuse are it.
Fit
The fit on the face is great too, Smith has very comfortable face padding on the goggles.
I found that the Fuse leaked a bit of air around my nose though...
Durability
The goggles LAST. I still have pairs from years ago. Now I will make the distinction between frames and lenses. As with any goggles, lenses get messed up fast. I recommend buying a few extra lenses so you can swap them out. Makes a huge difference when you put a new lens in an old frame--like getting a new pair of goggles.
Only time I have ever broken the frame I bounced my face off of pavement doing a summer rail contest. I think the goggles saved my face...