In one of my previous posts (tools), I mentioned that I had bought a gentle leader and had yet to try it out. Now that I've tried it out I now have an opinion on it.
In the beginning I had to get my dog used to wearing it, which took about a week or so. Even after having him wear it multiple times a day during meal times, he still did not enjoy wearing it. He tolerated it on walks, but would stop frequently and freak, trying to get it off of his face. Lots of treats and praise were needed to make the collar work.
I personally would not recommend the gentle leader unless you have a lot of patience and time to spend training your dog. I will continue using it and see if it gets any easier with time.
Another thing I wanted to bring up in this post was my experience with a new tool I have just started using.
It is a bike attachment that that can be found on http://www.petexpertise.com/dog-toys/bike-tow-leash-dog-bicycle.html
This thing has been a life saver for me. It is flexible, and is positioned low on the bike for optimal balance. The same dog who I use the gentle leader on would constantly pull me on my bike, causing me to crash on a few occasions. I used this and it worked like magic. No more pulling (except up hills). I also tried it on my dog who is scared of running close to bikes, and after a few minutes he was biking like a pro. I would highly recommend this product.