Product review (4 stars): ... see if it would line up----it did a really good job but at first it wanted to move away ...
I had the delivery of the dryer put it on and then we put it up to the wall to see if it would line up----it did a really good job but at first it wanted to move away from the alignment and it really concerned me that if the washer was bouncing around that it would  move the dryer away from the correct alignment.  I am still happy with this device and it seems to be holding .