Mine is a clone too to be honest.
I have no complaints with it other than that you must be careful when buying tips to get ones that have a longer threaded portion than most of them do (about 8mm threaded length as I recall).
Otherwise they bottom out, leave a gap, and that alone will cause headaches.
I accidentally bought some with shorter threaded sections (my bad) and had to turn the hex portion shorter on a lathe.
Now they work fine.
You MUST bottom out the heat break section against the top of the tip or you will have problems, guaranteed.
If there is any gap between them the melted filament will pool there, cook, and form a hard plug.
One of these days I may try to machine a soft deformable copper seal to place between the two sections, but it will have to wait until I get past a couple of other projects.
Also, FWIW, I would advise against buying any hot end block that uses a grub screw to hold in the heater.
Mine has the split clamp which grips the heater all around its barrel and is more gentle to it.
Plus the heat transfer is more uniform.
I have seen some clones that still use grub screws like the original FT5 versions (which I don't care much for just for that reason, honestly).
I use heat sink grease between the heater and block, thermistor and block, and on the threads of the tip and heat break.
Oh, and I forgot to mention earlier to tighten up the tip to the heat break while at 220-240C.
This is really important.
If you only tighten it at room temperature it will loosen up "at temperature" due to the thermal expansion of the aluminum block, cause a gap and cause problems.
I hope that something amongst all of this helps.