I have no clue about the slide of the ultras personally, but i got mine in last night, & theyre going back today, without ever touching the lanes.
I tried them on, felt ok, then i started walking in them for a few minutes. These things feel like dress shoes, theyre hard, flat, no give, no cushion.....its ridiculous. On top of this, the back, inside of the shoes is leather/vinyl, thus making my heel slide up & down as i walk.
Maybe im the minority, but i think tour ultras feel like crap. Ill be getting SST8's
Shawn