This probably won't be a popular comment, but my personal experience, scientific reports and interviews with OB-GYN docs and nurse practicioners (both male and females) have never found any evidence of a G-spot--they have thoroughly inspected women's vaginal canals, labia and mons and can not locate, in any of the women studied, an area of tissue that has different qualities from the surrounding tissue. It all appears the same. I have never, either alone or with a partner, found any special feelings from penis or finger penetration. I have never used a dildo, but we are thinking of it just for the fun of it and I expect the sensations to be the same and no G-spot, but we'll see. I think it is all hype from people writing book, articles and being interviewed for monetary gains. If you think it will work, it does--the typical placebo efgect. By now women don't want to be "uncool" so we have convinced ourselves to be cool and run with the crowd on this one.
Sorry, ladies!!! Just my humble opinion.