I meant that since you asked corri to describe it, if you look at other women's descriptions of what it feels like (on the internet), you can put all those descriptions together into some kind of overview.
I have read that for some women to have their g-spot stimulated produces a feeling that they have to pee. I remember that when I was younger I did not like that sensation-- pressure on that place (anterior wall just inside)-- it was curiously uncomfortable... but I also knew the goodies were on the other side, so I persisted. I've never had the ejaculation that I know of, but I do have O's that last well over a minute.