I own 2 of these and pretty much always use them as a pair so please bear in mind that while they sound great individually, some parts of my review will be a bit more biased toward commenting on them working as a pair vs individually. It fits him well and it is a little tight because i has to be. I love these so much I bought them in EVERY color! These were literally half the price that the local store wanted but the exact brand and quality. Although I generally do not lock my bike up in a high-risk area, I purchased this lock because of its 16mm diameter, which I understand is too thick for most bolt cutters. My biggest concern was the fit and stability. Hence going for the back strap. I wasnt sure if it takes a standard micro-USB2. The memory foam type material the soles are made of will also absorb some water, which squishes out when you walk. I would be happy to attach a picture to make the quality crystal clear - but that is not an option.