Im not an expert with glass, but from the bits a pieces of knowledge from proffesionals that i was able to gather, this piece is good. It came bubble wrapped in a small un marked white box, there were no scrapes, scratches or anything indicating bad handling or poor craftsmanship. The glass is very clear and to the naked eye has no small bubbles or anything that looks suspicious. The piece is symmetrical and not lopsided or un even. It also appears to be crafted of a single piece and does not show signs of the base being added as a second piece. Size wise this is nice, it is in my opinion a good middle ground. I would definitly reccommend using silicone lube with glass plugs as the glass base can get tacky and cause dis comfort from sticking to your skin. This is designed well for both girth and length. I would not recommend glass plugs to newcomers just because, it is not forgiving. I have a 3 in dia Silicone plug that this almost feels comprable to inserting due to the fact glass is does not give like silicone will.