I am not a dedicated slide player, but I was looking for a mellow-sounding slide that I could use to add some flavor to my music. I was not disappointed. While there are a couple of microscopic imperfections in the glass, they affect neither the tone nor the useability of the slide, and the edges are rounded for comfort.
The fit of the slide was undoubtedly the most stressful thing about chosing the right one for my needs. I have thin bony fingers with protruding knuckles, so I used a tape measure to determine the circumference of the widest knuckle. The slide I ended up buying was ever so slightly larger than that, and it fit my ring finger just right. Do not forget to account for the fact that fingers swell up in hot weather!