there have been some studies discussing the shortcomings of heads that are "short" in blade length..I personally have seen them used on whitetails in our urban program by compounders.
I was not overly impressed with penetration or blood trails.
One difficulty is the length of the blade, and the abrupt angle change required to get a decent cutting diameter into such a short length...almost makes them seem to have to be a PUNCH tool, rather than a CUT tool, if you see what I mean?
There's a reason broadheads, or anything else, for that matter, end up in a 'bargain corner' and it usually doesn't have much to do with them being a great product.
I hope you wanted honesty!