Once fitted properly the No Crow Collar works as advertised.
There was a bit of stress for both me and my poor rooster, with many attempts at adjusting the collars fit, but now he has adjusted to the collar quite well.
The volume and quantity of crowing has been reduced, which is the whole point, so hooray for that! However, this is not an idiot proof process and it's quite an adjustment for a rooster to adapt to.
Here's hoping the neighbors calm the **** down now! One neighbor is over sensitive to sound and another works late so needs to sleep in. I still lock the rooster in the garage at night so that there is no possibility of his disturbing the neighbors while a local sound ordinance is in effect. The collar does not keep him from crowing.
I had been less than happy about my initial experience and contacted MyPetChicken.com (the people I bought the collar from) with a list of grievances, feature requests, & possible solutions. They responded well and they've even edited the instructions to include a bit more detail in fitting the collar, which was one of my requests.
I'm really hoping they eventually post more detailed videos for fitting the collars on various breeds to help others get the best outcome with these things.