Cheap effective BMS

I have often used this forum to get info however perhaps now I can contribute something. I have had a lot of trouble with BMS for LiFePo4 12s- and finally decided some time ago to give a cheaper one a try.It has worked well on a 350w electric bike though that may be it's limit-not sure about that.
It was simple to install and has behaved perfectly for a good while now-the eBay Item No is 182366851756.It was post free and was under $20 .

Hope this helps someone
Peter

I see that your BMS has a shunt circuit. Not many inexpensive models have that. While your seller didn't have a 10S, I saw some similar looking 10S units for about $10 USD, so I decided to try one out,