Art hit the nail on the head. I'm in school myself, and have certainly used G_scholar for research. However, it's far less usefull than the resources my university makes available to me.
8 times out of 10, the G_scholar link is an abstract; the actual article is available to members of whatever. Point is, I can't see it. If it's not a "full article is unavailable" thing, it's the citations; they're not available unless you're a member of whatever.
I find far more often a regular google serach is more useful. That way I get actual articles. If you want a handy link for paper writing, let me share THIS baaad boy:
Citation Machine
guess what it does? makes citations...