What are your thoughts on Side Planers?

[MSM1970]

this is what I come up with once, it work ok but you had to hand line it in and out, i built a different one, don't have pics of it, same thing other than i bought 2 cheap trolling reals, put brad on them, it lets the out easy lust loosen the drag, easy to real in, use a release that slides down the line, so far it work ok, 1.5 mph max, need to work on better side planers, I've seen plans on hear, maybe some one show them again,