First, if these are geared towards athletes, the bands need to be bigger. Athletes will generally carry more muscle and have thicker wrists. I am at the 2nd to last rung and if bumped, the band will fall off. Second, mine shipped without a clip for the piece that attaches to my shoelace. I reported it, but one still has not been set. This makes it impossible to track workouts because both items are required for tracking when you register both. The ankle strap is out of stock and really should be included. In summary, provide options for size of bands, ensure all pieces are included prior to shipping and include ankle strap as a default option. I really wanted this to track my sleep, recovery etc.... and possibly replace my Apple Watch. So far I am disappointed.