Since the procs on these don't even work until mid-40's - Don't waste your platinums bying this junk. Get good at poisonmaking instead for the money. :P
Here's why I think it's junk-boots for a rogue;
At level 51, rogues can start working Aa's like all other classes... This includes the innate runspeed. Suddenly it's not so damn slow to move around hidden any more. You'll have more reliable transport then a random short teleport so You'll want more stats on your gear then these can offer at this point, no matter what kind of stats you use for the way you play your rogue (I love STR, DEX and HP myself), these slippers have none of any of it. The fade is irrational and pointless. It does NOT lose your agro, it only moves you far enough to not smell the sweaty armpits of your tank, but the mob still sees you and only need to take a few steps (that's how puny the teleport range is) before he can start squishing you again.
***** these kindergarden toys and get something with your stats instead.
To drop agro and get away from a nasty mob, there is NOTHING better you can do on your own then to get really good at sneak & hide skills and then use your evade.
Futhermore, at level 55, rogues run just as fast in stealthmode as they do normally.
At level 63 you get Shroud of Shadows AA ability (with this, only godlike mobs and uber dragons can see thru your hide) and ESCAPE - wich lets you enter stalth mode while running. (no need to stop and stand 'perfectly still' to hide).