I am currently testing one and the HW is great, but the UI is klunky to say the least, though it does appear to behave properly. In particular the FFT is first rate, though the labeling is often incorrect. But if you are used tolooking at DC to Nyquist spectra it works really well. Just look at the sample rate and calculate Nyquist in your head. Then divide by 10 to get the correct Hz/div.
I paid $206 from Hanmatek's Aliexpress store, but they are available as low as $180 on Aliexpress from other sellers
It has 140 MHz actual BW in the AFE and it's quite flat until the corner.
It seems to me a good candidate to jailbreak and modify. Anyone else interested?
Have Fun!
Reg