My buddy used the Gordon Eastman fawn distress call once when he jumped a bunch of deer in the thick timber. He heard crashing coming his way and he was thinking a big ol' buck was heading his way. To his surprise a monster cougar can out leaping towards him. Needless to say, he doesn't use the call much anymore.
I used to use grunt tubes while hunting the late season. The ones I tried were reed based and I found the reeds froze up on me way too often. I then watched an old Shockey whitetail video and he said not to waste your money on grunt tubes, best to just swallow air and BURP. It's free and it will never fail ya. It can give ya heart burn something feirce after a long day of doing it, but nothing some Tums can't fix. I burp all the time during the late season. Works like a hot damn. Especially when combined with a rubbing antler as I beat brush.