Very good piece of kit and perfect for what I needed. The only downside was the length of time it logs for. It seems to cut out after a few hours. Reconnecting it resume logging. This may be because I'm running it at the limit of its BAUD rate of 115200. I'm also using a 64GB SD card partitioned to 32 GB and formated with FAT32. This isn't exactly as specified in the instructions.