Yeah I have, they are ok, not as good as the transgo ones, just heed my warning and do the first stage of the kit and don't do the full neck snapping one.
The shifts are unbearably hard if you do the more race oriented install. Which will eventually flog out mounts, tailshaft uni's etc quicker, it's designed more for strip applications than street.
The stage 1 install firms up the shift to a nice level for the street in my opinion.
Just be very very careful during the install, you have to drill holes into your valve body and you also have to remove a series of check balls and springs etc which need to go back in the same places.