The tiles in this tileset are positioned irregularly, so it is not possible to use this tileset in many tilemap editors without editing the image first ):
I was able to load the original tileset image in its presumably intended form in Tiled, but it required manually defining where each tile is, since they're not on a uniform grid. Once that hassle is over with though, the tiles work quite well on a 48x24 isometric grid!
I did notice some weirdness when making non-stepped turns though - you can't always get a nice light line between tiles in corners, you have to choose between no line or a thick dark line. In the screenshot above, I went with no line.
In Tiled, to create the stair-stepped effect like in the mock-up without creating a load of layers or Objects, one would need to make three versions of the tileset: One with 0 vertical drawing offset, one with +8, and one with +16. Works nicely this way though, and allows keeping the tiles all in one layer.
Thanks for sharing this tileset :D Although I don't have any plans for it, I had fun playing with it, at least after I managed to load it as an actual tileset xP
These tiles would probably look amazing with a little programmatic bounce/displacement when the player is on them.