I really wanted a small slim tracker, I have very slender wrists. And I wanted one with a continuous heart rate monitor but all trackers with those where to big for me. I was very happy when the Fitbit Alta HR was announced. I have had it for going on 1 week now and I am very pleased. It fits well on my wrist and doesn't look guady at all. The watch like clasp is great, the clasp on old fitbits were awful, they did a wonderful update with these ones. The continuous heart rate tracker is exactly what I was hoping it would be. So far I am extremely pleased with my purchase. I would give this 5 stars, my only reason I'm holding off is because I want to see how long the battery lasts on a full charge. Will update then.
Update: The charge lasted 6 days till it notified me low battery, I let it run another full day and it still didn't die. Charged it on the 8th day. Very happy with the battery life so far.