Since we intend to burn copious amounts of wood this winter, I have set up two of these dual purpose chopping/splitting block combos. This one just happens to be right behind our outdoor kitchen, which has no fewer than five different wood burning cooking stations. At least one is utilized every week.
I will begin, however, with the taller chopping block. Though this is almost entirely intended for green woodworking, it is also useful for splitting kindling–I have one of the Swedish kindling splitting tools that looks like a miniature drawknife. However, for any green woodworking project, this is the perfect waist height for rough trimming a blank with a hatchet, whether it is a camp or broad hatchet. It is also great for sitting a beer on.
The lower one will be used the most, as I have cords of firewood that need splitting. This height keeps the wood off the ground, as well as keeping the splitter out of the dirt. My old splitter is an el cheapo big box store product. My main firewood producing station is to have a quality German made Ochsenkopf (Oxhead) spitting axe.
Finally, for large splitting projects, there are always steel wedges, which are best used in combinations of three. The large piece of cherry that rests on the splitting block was split with wedges, as it splits very well. When the wood tells me what to make with it, out comes the hatchet.