Thanks for this wonderful, new community!

Here's the devices that sync to MedHelp.

http://www.medhelp.org/health_tools

Withings WiFi Body Scale
Measures your weight, body fat, and BMI

Withings Blood Pressure Monitor
Measures your systolic and diastolic blood pressure, and heart rate

Fitbit Ultra
Track your activity, calories burned, steps, and sleep efficiency

Zeo Sleep Manager
Take control and manage your sleep

Fitbit Aria
Measures your weight, body fat, and BMI

Is anyone using any of these?

[BadKitty64]

I have a Withings scale, which I am mostly satisfied with.  

I just got a Fitbit Ultra, which I like very much so far.  I have only had it a day, though, so still learning about it.  I can't decide if I should go for the Premium services or not.

[sk123]

I have a Wtihings device and I like it. However, I think the fat % is pretty far off. I had my fat % measured using calipers and it was 14%, but my scale says it's about 23%. I think the fat % is more useful for trending purposes than as an absolute value.

I used a Fitbit before and I liked it. I bought two more for my parents for Father's Day, so that they can compete against each other. I've never tried the premium services. If you decide to do the premium services, let me know what you think.