Sideshift converts your altcoins to BTC and then deposits that amount of BTC, so it will require 1 confirmation before it shows up in your account. How long that takes depends on the blockchain, could be 30 seconds or an hour.
I have made deposits and withdrawals without any problems, everything went smoothly, but it took more time. In addition, the withdrawal fee is quite low. I almost received my full withdrawal. How can I get more krill? Because krill is quite useful for participating in certain tournaments.