Had one on FR Charvel. Didn't like it. It slipped. Maybe I'm just too bar happy at times and end up moving the stop. I had more stability floating than with the T-No. I did have a JP6 a while back (now all Axis') and thought it was a great trem on its own. YMMV.
Oh yeah, the trem on the JP6 is awesome no doubt. I was thinking about going tremel-no so that I could lock it when I wanted to do some Sabbathy type de-tuning without having to buy another guitar.