I've used both the Judith Williams one & Clarins Extra Firming Neck Cream, both good & both smell gorgeous. But to be honest I get the same results using a rich body cream or whatever face cream I'm using. I do have dry skin so tend to use very moisturising ones. Best thing is to go down with your face cream onto your neck & up with the body cream, so it gets a double dose. I'm mid sixties & have no rings on my neck, or crepyness, so it's worked for me.
The only one I had real problems with was the Gatineau one. I know lots of people swear by it but I bought it as part of a TSV, applied it just once & within five minutes my whole neck was an angry, burning, bright red. Very, very sore. I washed it off immediately but it still took a week of antihistamines for the horrible rash to clear. Very glad of the 30 day money back, it was in the post the same day!