anyone use tri flex? cause I'd like to try it...

I found it on sale at amazon, has anyone tried it? says was 34.xx now 6.99

http://www.amazon.com/dp/B005H79NOK/ref=as_li_ss_til?tag=livingmoreonl-20&camp=0&creative=0&linkCode=as4&creativeASIN=B005H79NOK&adid=0CQMMX8QVCW2RHZF4TQE