I am in favor of fishfinders in general, flashers for ice fishing, and all that. I've got one that I can start using if X-mas would just get here soon. I fished with a group of people yesterday, though, and one Vexilar FL-8. You can see fish when it looks like the bottom suddenly moves up a couple of inches (typically following your jig), but the Vex had nothing to do with fishing success. With the Vex, you could see the fish and be frustrated by your inability to get it to bite, but without it, you just jigged until you got a bite. The non-vex fishers had much more success on this occassion! I suspect under different conditions a flasher would help out more, but in this case it seemed only to help confirm that your fishing frustrations were warranted (you KNEW the fish were there, AND not biting).