You haven't told us, which SmartLab ... device you're using.
About a year ago, I ordered their blood pressure monitor and tried to talk to it according to the Blood Pressure ANT+ device profile. I failed. When I contacted them (a company located in Heidelberg, Germany), they were very cooperative, telling me that they were aware that their blood pressure monitor had issues and didn't really comply with the profile. They told me they would fix that within a few weeks. As I didn't really like the build quality of their device either, I sent it back. Which is a pity, since it's the only ANT+ enabled blood pressure monitor available in Europe these days.
Seems that either they haven't fixed that issue yet or have similar issues with other device types.
Rather poor, taking into account that they advertise their devices as being ANT+ compliant.
Dynastream, it looks like a good idea asking this company for their compliance tests.
Cheers,
OMB