Thank for you for a helpful review! I am currently wearing the UP24 (just got it last night), but I bought the wrong size and will need to do an exchange. I started wondering if I should have just bought the Shine. Now, I know that the UP24 (or possibly the UP2 is a better choice for me). I love the UP24, but it's a bit too bulky. I do love the software, though, and it's already got me to moving around more (to assist in my physical therapy).