I don't own any. I came close but bailed out on buying a Commander. Still thinking about it but I think I'd rather get a Microtech SOCOM.
Well, enough about me...
Emerson is considered by many to be the pioneers of tactical folders when he licensed the CQC7 design to Benchmade many years ago. Apparently, the old Benchmade made CQC7 is considered a very nice piece.
The Commnader has a strong following here but it took some criticism from this forum two years ago as a few owners sometimes complained that the fit and finish were not always consistent. Then again, you can't please everyone at this forum.
Why would you want the Emerson? For its reputation as a hard use knife. It's like a Mack truck.
The trademark feature is, of course, the "Wave" which is that hook cut near the top rear along the spine. If you have the knife placed in your pocket in a certain position, the blade will deploy as you draw the knife out thereby making it faster on the draw than an automatic knife.
Another thing is that the majority of their blade edges are chisel ground (profiled on one side).