So from what I've read in these comments, the product has a bad design (weird font that doesn't fit the theme, keycaps catching on each other in certain keyboards, not properly fitting on rotated switches), is advertised here for a bloated price, while getting it elsewhere is cheaper, even with shipping. And there's the fact that there seem to be no other compatibility packs. The only positive this seems to have is the amazing packaging.
TTheunsIt's a slightly different feel from standard caps, but as somebody who purchased this kit the last time it dropped, I have to say I actually like it. It's one of the quietest keysets I own, turning a loud board into one of the quieter boards in my collection.
If you're not using a US ANSI board, then yeah it might not be for you. I'm using Dvorak, and having the homing bumps on the F and J is weird, but I still like the look and feel of this set. I'm definitely buying another kit to put on a board I'm building for somebody for Christmas.
TTheunsYeah I got the Magicforce bundle with these keycaps, and frankly the keys caught too much to leave them on. They're fun for novelty, so I might add a few to a more heterogenous themed board or switch tester/pad or such, but they really, really didn't work out for me for actually typing on them. (On the plus side, the Magicforce keyboard looks great with the Tai-Hao Miami keycap set).