Have had mine to the range a few times. Very easy to set up and compared to the traditional chrono is pretty much a set on the bench, point it towards the target, turn it on and it's ready. Mine has tracked .17HMR pretty well - but NOT perfectly - once I fiddled with the location of the unit to the rifle muzzle. Have not tried 22RF, but it did well with .223 Remington. Everything else in larger calibers it read perfectly as long as I remembered to arm it (duh!).
Really like mine and although expensive compared to the options, I would buy it again.
