Note: I haven't tested any of them, and I don't plan to. Nevertheless, I want to catalog them here because they're interesting.
What I don't like in particular is that, as pointed out by The Register, even winver lies and says the system is Win7/XP, and you can't install any updates from Microsoft.
Transformation packs for Windows 10 are notoriously complicated, involves multiple apps/components, and on top of that, can be broken by Windows updates. I tried Luna10 on 19044.7417 and it didn't work. So I gave up.