I'm new to OW (less than 100 miles) and was having a problem getting my foot to always activate both front sensors...even with flat skate shoes. When I did get my foot positioned just right, I was afraid to move it and sometimes sucked because my foot was not in the most comfortable position. I added stick-on furniture pads which really helped, but these are way better! Almost zero false starts. The adhesive is also excellent - get some, you'll be stoked!