IME Fiskars is just fine as far as cheap axes go but that's about it. You could do a lot worse and the price is fairly competitive but there is really no comparison at all to a quality traditional axe. (And no, it doesn't have to be a Gransfors Bruks - not that long ago, there were many, many quality brands out there though sadly most of them have been put out of business by the cheap mass-produced crap.)

My experience with Fiskars is mostly limited to the 14" hatchet but since all their axes are basically identical in design, I suspect it applies to more or less the entire line. First off, the geometry is weird. The head is simply a thick steel wedge. The edge is obtuse, much too thick for efficient cutting but still not quite thick enough to excel at splitting. The design is clearly a compromise - an attempt to make an axe that would work both for cutting and splitting wood but it isn't much good at either. Once you sharpen the edge you'll constantly need to reprofile the entire head as well or the edge will get even more obtuse over time.

Second, the edge is a bit on the soft side. Edge rolling is a problem if you happen to hit a knot. Gets worse cutting pretty much any kind of hardwood. It is possible to restore the edge fairly quickly but I don't like having to sharpen my axe that often.

Third, the handle is hollow and wrapped (molded) around the head. It looks and feels more secure than it is. The handle can still crack or get loose. It happened to a friend of mine and he didn't even do much heavy chopping. Once the handle is loose it's impossible fix it. You can't replace it with a wooden handle either because there's no way to fit it. So once you damage the handle you might as well ditch the axe because you sure won't be able to repair it in the field.

You could improve an off-the-shelf Fiskars axe a bit by regrinding the whole profile but it's tedious work and I'm not sure it's worth the trouble. For a "beater" axe intended for rough work it might be acceptable. But for any kind of serious chopping/woodworking you'd better look elsewhere.