This box is awesome. Can't find any issue. Just ordered another one.
Tuner is very sensitive and had no problems to lock channels with low SR
for example: on 10°e
"lad" channel had SR: 1099
Immediately locked and smoothly video.
This channel with ZERO 4K had constantly glitching.
The only issue is maybe, that, when found BISS keys and opens channel, that keys are totally wrong (different) with the common known keys. But, who cares. Channels were open.
Did you notice this little issue?
Regards