I just purchased my first glass dildo last week. Well, first glass and stone. I LOVE them both. I've never been much of a dildo girl, but these are both awesome.
I got the Rainbow Mega Nubbly because I prefer texture with my toys. I didn't find any problems with the nubbly texture on the glass for my first time with it. I am just totally blown away with how much I like them. I have the Bumpy Spiral and Violet Wonder on my wishlist. Instead of the Pink Swirl, tho, I have Pink Swirl G and Pink Double G on my wishlist. I was thinking of going with one of the swirly dildos next. It is hard to decide which to get next. lol I'm sure they will all be just as wonderful as my nubbly, all in their own way. Since I like texture, I think the tighter swirls on the G would give me more pleasure, as opposed to the Pink Swirl you have here.
The stone I got was El Olas. It is great as well, and obviously isn't really textured. Just the solidness of that feels great. I guess it is much like the less textured side of the Violet Wonder.
So, I guess it all depends on if you like texture and what kind of texture you prefer. The Violet Wonder does look very fascinating. I think of the options here, I would go for the Violet Wonder first.