major difference from the first use
I am a big guy and my job requires I look up a lot for extended time. My neck tends to always be tight, sore, and I can crack at will throughout the day.  I received and used this 4 days ago and from first use have felt looser. Only used first and second day so far and my neck hasn't cracked once since. Just out of habit i try to crack it all day long but nothing. Havent used last two days just to see how long before the tightness and cracking comes back but so far I am impressed with the immediate results. Have let several friends try it and all have felt a difference after one use and a few have already ordered their own.
Rating: 5 stars