Very few women can orgasm without any clitoral stimulation, but it's definitely possible to have stronger, ore intense orgasms by adding g-spot stimulation to clitoral stimulation. There can be a social pressure on women to come just from vaginal and g-spot stimulation that troubles me. I've met men who are offended when their partner can't orgasm from just intercourse, as if their partners' bodies were defective. Not cool.
On the other hand, if you're just curious about the reports of g-pot orgasms being stronger, I definitely recommend adding g-spot toys in with your normal routine, and have fun!