I have one. Overall, I am concerned about the RTL-SDR dynamic range. So I also ordered a Nano-VNA-V2. My goal is to make a set of matched filters for the UHF band. Most of all I need to reduce the FM broadcast band strength, and other high power transmitters. I'm also going to confirm that the antennas I bought are reasonably matched. My goal is to use it to look for 902-928 MHz ISM band devices. Since there is a lot of legally unlicensed activity, I'm trying to find out what's possible.