Well, I don't have any trouble locating my G-spot, but I do have a favorite G-spot toy... and a G-spot. Lol. The trouble I tend to have is going at just the right speed & pace to really bring myself to this amazing orgasm when my partner can go for it & get me there in seconds.

Anyways, my favorite G-spot toy is Sweet Lola, it's a glass dildo. It's one of the only two I can give my own self O's with. It doesn't always work if I'm the one operating it, but it does always bring me tons of pleasure and has never failed me when my partner uses it on me. The length makes it so much easier for me to use on myself than most toys, though.

As for G-spot vibrators, I actually have had pretty good luck (even on my own!) Lia G Bliss. It's not super long, so I was surprised when the first time I even used it, it gave me a small G-spot O!