I started with a Chrony about 20 years ago, moved to Oehler within a year and now have a LabRadar. I never shot any of them, but the Labradar is vastly superior due to the ease of set up. Getting an optical chronograph lined up down range is a pain when other shooters are around. The fact that you can pull the SD card and load the data analysis to an Excel spreadsheet makes it even better.