General PvE? No, I've never found a use for them. In any situation where I actually needed to catch something a snare worked just as well and was MUCH more generally useful. In any case I needed to kite normal speed worked and if I was under the effects of a snare none of the movement speed up's worked. True even in HM, while in HM I would occasionally run into a case where I wanted them it was still MUCH more limited in scope than taking a snare or other damage skill.
Of course, some specialized PvE they are vital - some farming builds depend on them and, obviously, runners tend to want increased speed. Especially as in Normal Mode that tends to break most aggro. Though I would add that is even *more* reason why it is not terribly useful in PvE - scatter is almost always a Bad Thing(TM).
Then there is the occasional place where I know I can avoid all but one or two fights and can run around everything - two warriors alternating "Charge" is quite nice there
I don't PvP - but even in my limited knowledge of it I can very much see where they are useful. You will have to listen to others for anything other than random ramblings that are only going to be partially correct.