Just got mine, which may be a second run. The blade seems to have mild full convex overall. And the edge seems to be convexed as well.
New and unused sure didn't last me long. Within about two minutes I had chopped a frozen pumpkin to bits and started in on some Doug fir and scrub oak. Then stabbed some stumps and hacked at them a bit.
Afterwards I washed up the blade and inspected it. Not much smoothing of the coating, no edge damage, still straight and true. The machete does a better job of chopping branches but as a short sword that can handle a ton of abuse I doubt this blade has many equals.
It's really about perfect, I've been wanting something like this for a long time.
It's a little expensive but worth it in my book.
I was thinking; about three inch longer blade and shorter handle, but then it would not balance like the Waki does. I give it two snaps up!