This glass toy was exactly what I was looking for to use for penetration play with my girlfriend. I loved the smoothness of the glass, which was my favorite quality, and that there were two ways to use the toy (as both ends are insertable). This toy can also be used anally with either end.

Because it's glass, it is very stiff, the color I have (purple) is beautiful, and has no taste, sound, or smell! (At least, any sound is not coming from the toy itself...) The size is nearly perfect, it isn't too long or too small. It's well-proportioned, except for bulbous end, which for us was too big. Here are the size details:

Length: 7 1/4"
Insertable length: 3" / 4"
Circumference: 4"
Diameter: 1 1/4"
Weight: 9.7 oz

We used it for penetration, and my girlfriend and I both love it. Because it's borosilicate glass, it's easy to clean with soap and water, or toy cleaner. As always, if you are sharing it, you'll want to use a condom for protection! We have used it with the Hitachi; it was a little clunky to have that all happening in such a small place, but it was doable. It's also a little difficult to use during oral sex, but not impossible. It's not very different from using fingers or another toy for penetration at the same time, so if you are used to that, it shouldn't come as a surprise.

I would say this toy is not for beginners to glass or G-spot dildos however, because there isn't any give and the bulb at the end can be too stimulating for a first-timer! But, if you know what you like already, this toy is a great addition to a collection. Additionally, be careful about travel. I'm not sure how easily glass this thick breaks, but some other reviews have mentioned dropping it and that having some adverse affects.

I still enjoy this dildo from time to time, though now only for personal use. I certainly don't use it often, but it has consistently come through for me when I do! I stand by my original point though, that the bulbous tip is too large for the size of the shaft - I find that it actually gets a little - ahem - stuck when I orgasm because there is such a size difference. However, that may not be an inconvenience for most users. The other end is great for slow insertion. I have not used the toy anally, though I would think that with a partner, the shape would be very pleasurable.