Excellent product, we have had a nightmare teething time (can't imagine what it's like for bubs, 20 months!) so have bought this out of sheer desperation. We had noticed so many kids wearing these necklaces and asked why, so we thought all these parents must have had some joy and we'll try it.
They are great, like a previous reviewer said they didn't cure all the pain, but we have not used any Calpol since putting it on. Still have the drooling and chewing in a reduced amount without the pain YAY!.
Have just bought another one for the 4 month old!