I must be in an ornery mood because it seems I'm in disagreement with far more people the last few days. And I have to disagree with the above quote. To say generically that a lighter, faster tool is "more effective" than a heavier, slower tool is simple not true. For example, I could easily drive a 1-2 ounce wedge from a large bore gun at speeds approaching 100 times faster than any man can swing an ax or maul, carrying far more kinetic energy than any ax or maul... and I'm betting it would barely dent the wood, let alone split it. What is "more effective" is to use the proper balance of weight and speed for the job, or conditions at hand. That's why it isn't always necessary to swing the ax or maul just as hard as you possibly can, sometimes a half-power swing is all that is needed depending on the wood being split.
Sometimes the Fiskars will be the best tool for the job (and it's a fine, well made tool), at other times a lighter or heavier tool will be a better choice. The trick is to not get tunnel-vision and become single-dimensional in your thinking... The trick is to recognize (even when the FisKars can get the job done) when a different tool is the better choice. No way am I gonna' waste time and energy "slabbing" off the edges of a large round with the Fiskars when I can just grab the heavy hitter and bust it into four pieces with as many swings.