Yeah, I bought one a few months ago. Easier than bringing my big one home from work. Used it to tune a half wave VHF antenna on my son's UTV a few weeks back.
Works OK. Good enough for hobby use. Interface takes some getting used to. There are some good tutorials on the youtubes.
Have you tried the Nanosaver software? Probably a dumb question, but in case you missed it the software really enhances it I think. Of course it adds a PC to the situation.
It's a great program and the dev is on the nanovna groups io always taking suggestions and updating it. A big perk of it is that you can add more test points or whatever they are called, searching for the term now. The device defaults to 101 I think but with the software you can force it to perform a more granular test with much higher resolution.
Just for that reason I used empty chassis from 2-way radios, one SMA and one BNC, with a coax inside the chassi attached to their antenna connectors and then to an analyser and measured when holding the chassi in my hand in a normal position, and hanging from the belt to see what the antenna type and belt clip did to the result. There's no way that you can connect an antenna to the end of a coax and get reliable results.HT antennas can be tricky to test unless you have your body is capacitvly coupled to the actual HT.
HT antennas can be tricky to test unless you have your body is capacitvly coupled to the actual HT.