The Great Blue slot is mostly popular with experienced fans because of the bonus round. Luck may not often cross your way when you play it, but when you win, that can be a really great prize, a huge reward for your playing. With the high variance in the slot game, the rewards can make your day bright. Well, before you win, the period of playing and expecting can be a bit long. But generally time goes on quickly, thanks to the wonderful theme and effects which make the environment captivating.