I bought one from Ebay last month as a kit, no issue building it, it didn’t come with any instructions at all, but they are all available online on the designers page.
This is the one I bought
because at the time it was the cheapest I could find and I was in no rush for it, but there are many more on Ebay from both the UK and China.
If you are planning to use it with low power, then the designer suggests that you wind the transformer in the bridge with a different number of turns, this is explained on his web page too.
I did mine exactly as he said, plus there are a couple of changes that need to be made to the PIC EEprom I also did it using a Pickit 2 under Windows 10 (1804) and had no issue whatsoever, in fact I do all my PIC programming using the same Pickit 2 and Windows 10 and have never had any issue with it.
I used the standalone Pickit 2 software though on the Windows 10 laptop, not Mplab, but the Pickit 2 works with Mplab too on my desktop under Windows 10.
The ATU seems to work very well, I also put the small OLED display on mine, it’s ok but a bit hard to read in daylight particularly bright sunlight, the text is quite small too for my aging eyes!
Only issue i’ve seen was when I tried to tune a 9’ military whip antenna, it wouldn’t tune below 10MHz, not surprising really as there isn’t enough inductance / capacitance, but a wire longer than 30’ would tune on all bands with a reasonable counterpoise attached.
The RF power meter on the OLED seems to be reasonably accurate too, at least from 1w to 25w it does which is all I would really trust the capacitors for, after doing the changes I mentioned above, mine will always tune with a solid carrier from 2w upwards.
All in all I can’t fault it for the price, it did take a while to arrive from China though.