First time I heard the snort wheeze was when I rattled in a trophy ten point buck. He wheezed and then tore into a sapling and made a scrape. Then he marched into bow range with his ears pinned back ready to fight...I took the shot and missed! So from then on out, I used it to see if it would work for me. I had a small buck pestering a hot doe at 200 yards in a powerline cut. He was ignoring everything I was throwing at him. Rattle, bleat can and buck grunt. I decided to use the snort wheeze (I think it was a MAD Calls Snort Wheeze) and it pulled him off the doe and he trotted 200 yds right at me! He came within 40 yds before returning to the doe. I thought that was worth keeping it in my back pack. I agree with M. Magis and would use it if you think the buck is gonna pass you by. My 2 cents.
Here is a rule of thumb that has served me well. If you see a buck trolling the woods with his nose to the ground , call to him. The only time I wont do this is if he is on a path that is heading right for my stand!