Nice build quality, hardware version 2.3, came with an extra thumb wheel switch. Super easy to get up and running, excellent accuracy compared to my other antenna analyzers. 4 inch screen is easy to read and touch screen is responsive and can by navigated with a finger.

I'm very impressed with this vector network analyzer. I'm using the NanoVNA-F to analyze the SWR of my ham radio antennas, which span from 1.8 MHz to 450 MHz. The 4.3" screen is easy to view and large enough that I can select options on the touchscreen with my index finger. Because it's portable (7 hours expected run time on 5 Ah rechargeable battery), I can take it up on the roof to fine tune a nine band vertical, or measure SWR in the convenience of the ham shack. Accuracy is outstanding and definitely better than the radio's built-in SWR meter. While using the VNA in the ham shack, I typically run PC software (NanoVNA Saver) to graph each band's SWR, which I can then save or print. The number of data points can also be increased using NanoVNA Saver. Do a Google search of NanoVNA PC software to find the file downloads. The user manual can also be downloaded, as well as firmware update information.

UPDATE: The user manual for the NanoVNA-F can be dowloaded at deepelec dot com under the support page. The current filename is NanoVNA-F_Handheld_Vector_Network_Analyzer_Incomplete_Manual_v1.0.pdf. Despite the name, it looks fairly complete and includes firmware update instructions. I updated the firmware version from 0.0.4 to 0.0.5, which extended the frequency range up to 1.5 GHz. Firmware updating is very easy and can be done without removing the case. I'd suggest waiting a few days after new releases are announced before downloading and installing them, to allow time for new bugs to be resolved. The 0.1.1 release just came out a few days ago, which adds a TDR and improved marker functions. It's nice to see the frequent updates which add features and improve performance.

This is a nice upgrade to the 2.8" screen. Those are a handy size but small. The larger screen is better and the aluminum case is well made. It comes in a plastic box with a cut foam insert to hold everything, and that's packed inside a really nice card stock box. Calibration connectors are included along with some cables and a usb cable. Very complete set.

It has a lot of tools in it. It draws a decent enough smith chart all things considered. The configurable markers work well and you can really measure a lot about your antenna system. I have not yet explored using it to sweep filters or such yet.

My only real complaint is that the selector knob/button on the side is a little gimpy. The switch itself is a bid trail and the knurled knob, which is a nice thought, rubs the case. I have to work it just so. The touch screen is decent but takes a touch or two to wake it up. I can overlook both.

Likes:

Larger screen
Markers
Wide frequency range

Dislikes:

Gimpy knob
Sleepy screen

In this pic a cellular antenna is being tested for LTE band 2 in the 1.9ghz range. You can clearly see the 3 responses from the antenna at 1908mhz (AT&T and TMobile phone transmission), 1943 mhz (AT&T phone reception) and 1970 (TMobile phone reception). So cool! Worth the money.

The VNA works fine and is easy to work with. Some limitations in functionality, but it is expected from such instrument. Giving it four stars because it's only few days after I received it, and I'm not sure if long term reliability.