Hmm... my NanoVNA died after about two weeks of use. The build quality on my particular example left something to be desired. I've replaced it with a Mini1300, which is larger and somewhat easier to use. It'll work as a simple SWR meter, swept SWR, VNA, and will display resistive and reactive components. Very nice. Since the micro flash card it came with was dead, I had to buy a replacement card, and then perform a HW cal, which required opening the unit up and soldering a jumper. Other than that, it's worked fine. More expensive than a NanoVNA, cheaper than a rigexpert.