Epik was ok, and then failed, then checked Dynadot , it failed also (in registration part).
And went to Namesilo. It worked at the beginning, but then everything went down. Then Dynadot fixed
itself, and paid registrations became successful, if not registered elsewhere already. And at the end Epik corrected itself as well (need to check if refunds are complete). By the way endusers (buyers) don't need to worry at all, if domains are parked/listed at these places. I'm mostly a seller, but once I was a buyer also, and yes, domains are transferred instantly; and this is how got my oldest domain (registered when I didn't even use email).