A few weeks ago I saw a lady walking a greyhound wearing one of these waistcoats (the dog, not her! Although I think I could do with one as well sometimes...) and I asked her all about it and where I could get one. It made me feel a whole lot better to talk to someone whose dog had exactly the same problems as mine when confronted with strangers and I was very interested to hear that the waistcoat definitely made people take notice and hold back a bit.
We don't use it on a field walk as there is no need - if my dog is free, he can run away from situations that make him anxious. I will use it on long road walks and if we go somewhere new - I shall be interested to see if it helps.
These waistcoats can be bought through www.spacedogs.org.uk. I have not been asked to write this by them, this is entirely my own opinion.