Samyang 24mm f1.4 ED AS UMC

Does anyone have any experience with this lens? From what I've read it seems like a good (cheaper) alternative to the Nikon 24mm 1.4. Reviews look good with great IQ but it does not autofocus which I think I could live with. I need it for landscape and night sky work.
thanks for any insights

Hard to beat for the price IMHO. Can't speak about that one, but I do have the 85 1.4 and it's really sharp and well built. I've read people's praise about the 24 and 35 Samyangs on other forums. Haven't read a complaint except a little bit of vignetting wide open.