Steins;gate is made by the makers of Chaos;head, and the latter title was complete crap. Steins;gate is the spiritual successor of C;H, but bounds better.
If you like time-travel, science-fiction, and a thriller, go for it. :)
Hey, about switch. If I want to change micro CD card to bigger size, Do I need to do something ? or I can just copy the content of old SD card into new once ?