I didn't notice to much the rear tires as much as I'd hoped, but we were running on a slick clay for the most part.. But good none the less. The fronts I can't talk enough praise about them.
the longer and longer we ran, the more the trails were rutted up, I found thatI could ride the wall of the rut with the front/rear tires and not get hung up. they didnt' slip down into the rut or anything it was amazing!!!!
The stabilizer, I have to get out and do some more playing with it and fine tune the settings.
I'd also like to look into Flexx bars....