The payment fees are just one of the important things you may want to look at, at an online casino. Other important terms include the minimum deposits and withdrawals, and general withdrawal restrictions.
Some casinos limit how much a player can withdraw in a pre-defined time-frame, like a day, week or month. This means that if you win a larger amount you may not be able to cash out the full amount. You can see casinos without withdrawal limits here.
Many players also place importance on the time it takes for the casino to process withdrawals. In the past many casinos applied pending periods before they would process the withdrawals. Today the competition among operators has led to many casinos processing withdrawals much faster. They pay usually within a day, but sometimes within a few hours. You can see casinos with fast withdrawals here.