Dunlop 202 Pyrex Glass Guitar Slide  

terrible slide. i've used this on all of my guitars -- electric, acoustic  and resonator -- and it's been the same on all: awful. it's way too thin and far to wimpy. heavily dampens the sound as well.

this slide is really good and affordable. It sounds and feels great, but i would recommend getting something besides glass because within ten minutes of buying mine I dropped it and it shattered completely, but if you're responsible then it shouldn't be a problem.

This slide is very affordable and makes for a nice mellow slide tone.  It's very light weight which isn't necessarily a plus.  I prefer a heavier slide for good tone.  In my opinion, the biggest problem with this slide is that it is just too small for any but the skinniest fingers.  I can barely get it on my pinky finger.  I will keep it only because it was cheap and not worth the bother of returning.  If it fits you, however, you will probably be happy with it.  Therefore, I will recommend it only for very skinny people with skinny fingers.