I have a Trinitim, I like it. it provides a hands free, stealth way to pull all day. I doubt it is as effective as heavy weights and likely not the only thing you would want to use. I use a hands free silicone leg attachment as well. I like this to mix things up. A few things you should know. Buy on Ebay and be patient. I spent $45 for mine after entering about 6 auctions. I have no idea if the magnets or tourmaline padding do anything at all....I am only concerned with the constant pull which it does provide. Parts of it break fairly easily. They have clips that detach if your pull torque is too much. They likely do this for safety reasons. These clips also break easily...but no matter. You just wrap them in duck tape and it works well. Also, the tourmaline padding rips easily if you pull it...but they give you about 5 of these. I've used mine for 5 months. I've fixed all clips with duck tape and actually really like it. Because it is hands free...this is the longest amount of time I have been able to dedicate to stretching. With manual stretching, the Trinitim, and silicone attachment with leg strap...I have actually made progress. I've Gone from 6.25 to 6.75 in about 6 months. The Trinitim is very easy once you get used to it and well hidden under pants. Oh...one last thing...if you wear it for an hour or so...and take it off, the tourmaline padding hurts like an M- F-er. I It sticks to your skin like the most painful bandaid you have ever taken off. Easily fixed though by wearing a condom before putting it on. I just cut of the end so I can take a piss when needed. By the way...wearing a condom has another benefit for circumcised guys. The fact tht we have no foreskin...desensitizes your head/glans from it rubbing against your underwear and being exposed 24/7. Wearing a condom with shea butter on the head, gets your glans back to the smooth shiny state nature intended. Hope this helps.