I've tried both of those two, and I never had much luck with the Ella/Gigi, but I know others swear by it. I think my g-spot may be placed differently. The G-Ki was pleasurable and did hit my g-spot, but it just didn't have the really nice, firm pressure that I was looking for. Plus, because of the silicone, it tended to need a lot of lubricant.
I was thoroughly and happily surprised to find that my new favorite g-spot toy only costs $30. And that's impressive for me. Others have told me that they love it too, so I'd have to imagine it's not just me. I feel like it's definitely one of those toys that, once inserted, goes *exactly* where it should without you having to attempt to find your g-spot. It makes me happy.
That's the Bent Graduate: link