The collar definitely helped with my great dane barking. if nothing else the sound of the spray scared her enough she would stop, hah! It didn't have an unbearable odor, the collar is adjustable and fit well. The down falls being, sometimes when another dog barked it would still spray her, you have to switch it off and on with a switch on the collar box, and the batteries will need to be replaced every so often. currently my batteries are dead and I am out of the spray, trying to discover how to get more without buying the collar all over again. in general a great alternative to a shock collar!