They dont slip about when youre walking and you dont have to tense your feet up to hold them on (which can be painful when you have shoes that do that to you). While this is only the second Anker product Ive ever had to give me an issue, I cant help but be disappointed when a brand I suggest and even gift to friends and family seems to be having QA issues. This wire is junk do not buy it. Terrible blasters every time I wear these. But IMHO, daytime use shows it on the weak side. The inordinate delay and callous attitude of Jabra as well as the shortfall in service obligation and breach of warranty is pparent. I have a 28 month old, she is on the 70% percentile for height/weight and fits pretty nicely on the seat, however, I have my doubts that she will fit next summer. My son outgrew his size 8/9 and the 10/11 size were so big on him! The lock is a bit on the heavier side, so I would use this on your commuter more than your race bike. Havent been using it but for two weeks, so not sure on the durability, but so far we really like it.