These spikes have been a life saver.  You gets lots of traction and have no worries for slipping (unless indoors).  I highly recommend them.  I have to blow snow and plow and have no problems wearing these doing both.  Though probably should take them off when driving in case they stick to the pedals.  This has not happened to me, but to be safe.  Easy to put on and take off.  Well worth the money.