So many different watch faces. Speech to text is amazing. Battery life is not the greatest, needs a charge every couple days. Sleep tracking is really cool, it will also even pick up your snoring if you turn that setting on, in case you ever wanted to know if you snore, and also hear it.Measures blood pressure pretty Accurately, but you need to calibrated regularly with an actual blood pressure monitor to maintain accurate readings, I think it's about once a month.Tons of little apps you can get for it, it's my favourite one yet. I've had the s2 and the s3 and now the s5 is out, but to be honest I'm not even tempted to get the newer one because I'm still enjoying this one so much and amazed at all the cool things it can do.