Yea there are a couple threads already, to sum it up...everybody is different. Me personally, I have a full strut, hen, and jake. They each have a purpose and each place I hunt has a deke that is useful. Lots of trial and error for sure.
I used them sometimes years ago but primarily a hen or two. Tried one of the strutters when they first came out and birds ran from it. Haven't used them in a long time mostly because I don't want to carry them around.
As others have said, lots of opinions about them. I had a buddy of mine from college come down several years ago to turkey hunt and he brought his strutter and hen decoys. We hunted two mornings and killed four field birds in like 10 minutes. "Well, that was easy" was all I could say. I don't call it unethical to use decoys and I don't think guys that use them aren't hunters, but I don't think it's hunting. I know they are a liability at times too, but given the situation with turkey populations, the ease of their use, their success on hard to kill field birds, their inherent safety issues, I think strutter dekes should not be used. I'm perfectly fine with bow hunters using them, and I guess I can see using them with a youth to get them some action one time. If they weren't effective they wouldn't be as popular as they are and sell for up to hundreds of dollars.