the main difference between flashers and "graph type" units is flashers display in "real time". i have a vex and can see my jig as it falls to the bottom. you can see how fish react to different jigging methods. i was fishing in 21 fow, crappies were on the bottom. didn't want to bite very well, and i had to "tease 'em" to get them to bite. now and then, i'd mark fish at 14 fow. i'd reel up to them and they'd smash it. the hungry fish were suspended, and without a flasher, you're fishing blind. and for the folks who think that it might be "cheating", they will find fish, but it won't make them bite if they don't wanna bite. (my problem this season so far). it's the first piece of equipment in the truck. hope this helps.