I have now used the Biostrap with the Shoe pod for 46 days. It is paired with the App on the iPhone X. When working, the Biostrap provides useful information, Heart Rate, Steps, Respiratory Rate, Sleep History and other measurements. I find the negative issues most frustrating. First, communication between the App and device is sporadic at best. When it does connect, sync times are frustrating as they take several minutes and the phone and device must be in very close proximity. As mentioned, I have now been using the Biostrap for 46 days. Most recently, in the last week the Biostrap has failed to properly record any workout data whatsoever for five days, four being consecutively. Currently it has become not even a good paperweight.