I use the GL on my Cayenne only for when we first get to somewhere. She is a wild women and wants to play with everyone and not listen. If I put the GL on her she calms down and then she is ready to work. Both Zane and Cayenne have been great on the leash and do not pull. Zane is a lot better than Cayenne and I have never had to use a GL on him. I have noticed that Cayenne will have a rub mark on her face after wearing the GL for a while. If I walk both of them I have to put the GL on Cayenne to keep her steady but so far I have not ever had a problem. FYI you cannot take the CGC test in the US with the GL they are working on changing the rules so you can. I actually asked if I could walk Cayenne through the test with it on the first time or during half of the test and it helped calm her. Then we retook the test without it and passed with flying colors.