I bought a Gerber 800 Legend recently so I've not had as much chance to use it as my other tools. The main attraction for me is that all the tools, except the pliers, are easily accessible without having to unfold the handles.
Except for the knife, most of the individual blades are identical to those found in the Gerber 600 series. The 800's combination serrated/straight blade is a drop point shape. The knife and scissors have thumb studs and can be opened easily using one hand -- if you are right handed. I am left handed and use an index finger on the thumb studs.
The spring loaded pliers is a plus. The handles are somewhat far apart when using the pliers, and are a better fit for large hands. My hands are not large. Even when the tool is collapsed, it is wider than my other multitools except for the Leatherman OHT.
The Legend 800's replaceable carbide cutters are the same as on the current Gerber 600 series. Cutting copper wire is done cleanly, but requires more pressure on the handles than tools without the carbide cutters. Wire cutting of the Legend 800 resembles a scissoring action more than a sharp knife edge.
I don't have any argument with quality of construction, though the screwdriver blades don't look as strong as those found on the Leatherman SuperTool 300. The Legend 800 lacks an awl. I'm more apt to use the scissors, file, and perhaps the saw than an awl. Speaking of the saw, I replaced the supplied Remgrit blade with a metal cutting jig saw blade.
The Legend 800 user reviews on Amazon are helpful. Check them out.