I have the UP and love it, but wish I had the UP24. I forget a lot of times to sync each day (I had a system in the summer, but it's depressing now that my steps are so few), and I would love the HRM because I find resting heart rate to be a useful fitness test and have never found an easy way to check it daily. I would LOVE to just be able to turn on my phone and see how far I am from my step goal. It might motivate me more, as it is, even when I was plugging it in every day, I only did it first thing in the morning and last thing at night, which meant I never thought throughout the day "oh, I'm about 1000 steps short of my goal, I should try to walk a bit more."

That said, I love seeing how I can change for tomorrow, or what worked well for the day, and I wouldn't change it for a fitbit or apple watch or anything else. I would, however, change it for the UP24 if they'd give me a slight discount since I already have this one.