I've used one a lot, but I don't use it alone and expect it to be the "end all" in calls. I normally use 4 different calls in any one calling situation during archery season.
When you hear a heard of cow elk talking, they make several different sounds at several different volumes. To expect to imitate them with JUST a hoochie moma is a big mistake.
I like the call, but if I had to choose just one call, it wouldn't be the one I'd pick.