I am a casual runner, about 15-20 miles per week spring thru fall and less during winter months.  I have always struggled with laces....either too tight resulting in foot pain, or too loose allowing pebbles to sneak in (I am a trail runner), and stopping 1 - 2 times each run to make adjustments.  My feet are different sizes apparently because I could never seem to get my right shoe laces tight enough, and my left was always a bit too snug even after loosening several times.
Enter IBungee.  I used them today for the first time.  I installed them on each shoe and walked around the house to get a feel, I adjusted each shoe a couple of times which helped decide on the perfect tension.  I ended up lacing similar to what I had with static laces - skipping two of the crossovers to accomodate my wide foot, and lacing it tightly at the ankle to keep pebbles out.  I ran 6 miles today and for the first time ever, did not even think about my shoes or feet while running.  It was fantastic.  I am so glad I found these.