I have a gobble tube, but use it maybe once/yr. I hunt almost all public land, so safety is a big issue, and acting like a gobbler is NOT what I want to be on heavily hunted public grounds in PA. In addition, for the most part, the gobble tubes don't sound that great. I can do it w/ my mouth call and it's better than the tube, but again I just simply don't use it.
I mainly don't use it, because I've had more success over the years, trying to employ the lonely hen tactics, then I have trying to suggest another gobbler is moving in for a fight, etc.
My goal in the turkey woods, is to be an easy hen. "Here I am, come and get me and I'm yours, there's no stress here". Not, "Hey come in and fight if you want me", or "I'm coming to steal your hens", etc. I want to make it as easy as possible, for a lonely gobbler, or a scared naive/lonely jake to come in and get w/ a hen. I used these tactics again successfully twice this yr alone, 3 wks apart in hunting areas 50 miles apart, to close the deal. No super aggression, nothing threatening, just hey baby, how you doin'?
Believe me, it works. In all my years-- consistently I think you'll get more gobbler action in close w/ "honey", than with "vinegar". But like any hunting, there's always a place/time where something will work. Sometimes you have to throw the kitchen sink at 'em to get it done, but for me, I keep the gobbler tube in the vest.