Well Mike they are a very good call to carry, I don't think there are any disadvantages to having one in your vest. With a double sider you get two sounds out of one call which saves you room in your vest, so you don't have to carry two differant calls. You could carry two calls and have all four playing surfaces covered.
Dodge County NWTF Chapter
WI. Youth Turkey Mentor
*Safe Hunting Is No Accident*
It takes One Second to be Stupid, a Lifetime to be Safe.