Our unit has unfortunately after one or two days, the flashing battery icon on the display and was only with "new" batteries move back to work. However, a battery meter showed the supposedly dead batteries at full. Otherwise, the device is good but in functionality. The measured values are not comparable with proffessional sensors. But those who want a self-test and only time will see "what he has," making it adequately served! For the detection of suspected self-diagnosis to be immediately necessary visit to the doctor, can recommend the unit clear. Unfortunately, you can not set a time, so that the logs are displayed only in minutes and hours. We will see whether the replacement device if necessary works better.
Addition: We have found that the device with one of the supplied (better download the latest!) Program works currently. If both programs you start (live display and read-out program) both access the same port and block under WinXP. Once you start the selection program alone, the data exchange works without problems. Printouts but you should print in landscape mode and the "gauge strip" in the 60 Minutan classification. Otherwise you recognize too little out.
