As far as I can tell, this is a slight redesign of the
Select Crystal G by the Sinclair Institute. Based on the measurements given by Eden, the Onyx is slightly longer, but I think this is incorrect; I think they are basically the same size from reading the descriptive review on the Select Crystal G and the manufacturer's website. I am not a fan of the redesign, as the major differences appear to be the ribs and the slightly more rounded end. I agree with a reviewer on another site that these are not improvements. I've used it a few times since writing the review but overall, it does not seem to reach the prostate all that well, at least for me. I finally tried inserting the bulbed end but this was very uncomfortable.
It's still fun, easy to insert and clean, only requires light lube, and all the other wonderful things about glass, but I just can't say I'm going to use this that much. Maybe I'll get a longer glass toy at some point, I do love the fact that it's glass but this one just doesn't quite thrill me.
Thank you for the review!