Sure thing! (with apologies for a slightly off-topic post)
I have the smaller of the Mueller Dynamax splitting axes. I'm sure the bigger one is also great, but the shorter handle on this one is pretty, um, handy
I split mostly ash with a small bit of maple, black cherry, and every once in a while white pine, and I find that this splitting axe is just fantastic on the hardwoods. The head design rockets the grain apart and really doesn't get stuck, and the built-in overstrike guard gives great peace of mind. Compared to a Fiskars X27 (one of my other regular splitters) I find this axe more effective on hardwood. I think this is because the Mueller has a wider wedge, meaning that it splits and then really forces the split pieces apart.
For softwood, the results don't seem to be quite as good. Most of what I'm splitting is really knotty, and it seems like the thinner wedge of the Fiskars X27 does much, much better at getting deeper into the grain to force it apart.
The Dynamax also does a pretty good job on big hardwood rounds---enough that I can get away without using a maul for the most part. For the really stubborn stuff the maul's extra grunt helps a bit, of course.
One minor criticism: the "shock absorbing" thing seems mostly to be a gimmick. That's not a serious complaint, though, because this same design feature is what gives you the integral overstrike guard, which seems very solid and is thick and heavy enough that it probably lends the axe a bit of authority, too. But I wouldn't assume that this axe is much better shock-wise than, say, its Prandi or Helko or no-name counterparts with the same head design (though none of those has the integral overstrike guard).
In sum: definitely one of my favorite splitters. You could probably get away with a cheaper axe of the same design, especially if you added a beefy overstrike guard to it, but I have no buyer's remorse.