DD got the Alta hr for Christmas and I just grabbed one for myself so I can compete with her. You can customize the display a bit and then as you said the rest of the info is in the Fitbit app. I like that you can set reminders to move (buzzes around the 50 minute mark of the hour if you haven't gotten 250 steps in that hour). I have it turned on for the weekend only but she usually will get up and get some steps when it buzzes at her. The clock is nice--She's the only person who consistently knows what time it is. It's supposed to activate the clock when you swing your wrist up to look but sometimes you have to tap it. I like it's slimmer profile. I have huge wrists for a woman and DDs small even fits me so I think the small should work for most women. I wish it would display the actual number of steps. Once you are over a thousand it says things like "2.3k". For $50 it's a fun toy and reminder to get some steps in.
momma to DD 12/08 & DS 3/13