I bought these running shoes to replace an old pair of Nike Air's.  I ran in them for a week, which is 3.5miles 3x a week on a treadmill, and they worked like a charm.  However, halfway through the second week the left tongue slips down under the laces and throws off my gait making running unenjoyable.  I've experimented with tying them a multitude of different ways but to no avail.  I love the PUMA brand unfortunately though, I think these will be my last pair of running shoes from them.