When is a good time to buy armory? how usable is the engine right now?
I want this engine bad, but if it doesn't work well, I'll just wait till it's a little older.
You should get it now because this is one way we can support development. It's unusable at the moment for anything serious and keep in mind that Kha is as much of an experimental technology as is Armory. So it will take a bit of time to reach a stable point.
Thanks, I will think about it.
If you want something ready for creating stuff and you are not a fan of 'early access' thing, I would wait till the preview tag gets dropped.
That is most likely what I will do.