i've tried them for a while, but i don't run them anymore. i know a few guys who run spring bobbers almost exclusively and do very well with them, but they don't play well with my style of fishing, which relies on being able to feel the jig or lure and what it's doing. i use high-vis line, so a lot of those super-light crappie bites get noticed by seeing the line jump, move, or go slack