I've had an Emerson Karambit a couple of months now. I'd make the following observations.
The lock is harder to close than necessary, not to the point that it's a problem but I would expect better from a knife in this price range and category. The lock has never failed but looking at it it does not inspire confidence. A knife you can't trust (whether a valid concern or not) may be a liability. The blade is not as smooth in opening and closing as it could be but it will be fine once it's worn in a bit more. I think the blade is excellent, the edge is sharp enough but no more than that - I would describe it as a good working edge, I'm sure I could get it alot sharper if I tried but the way it came is a lot more practical and durable. I find the handle very comfortable in every position I try it in. What else would I change? I think the handle is to large for the lenght of blade, I think Emerson should consider offering (as well as, not instead of) the same handle with a bigger blade and the same blade in a smaller handle. I thought the wave feature was a gimmick until I tried it - It is quick!
It is very easy to cricise so -
Bottom line: Am I happy with it, would I buy it again?
Yes and Yes