I ordered two of these boards a few weeks ago and I have just built one of the circuits and it seems to be working fine at initial switch on.
I have also ordered a couple of these:
12V 10A Undervoltage Protection Module Low Voltage Cut off Automatic Switch On Recovery Storage Battery Board
It will be interesting to see how they compare - small size etc.
My intention is to protect Lipos in my small subs and the Practical Electronics circuit has the advantage of being able to add a magnetic "on" switch very easily.