I can't , but I have been on boats that use them, and I've been impressed!! When nothing else works, downriggers will. The boats I've been on had manual. They were super easy to run!
I run four cannon electric and at times they are a hand full!!!usually pull double lure setup's on each one ........sometimes catch limit in one pass!!!!!!!!!!!they are the way to go in the dog days of summer!!!!!!!!!!
i have used cannon electric downriggers for 10 years. they are a fantastic way to fish - from mid-summer to early fall. i have 2 and use double lines on each good luck hydrasport