I've made many packs over the years. I wouldn't be happy with this one, corners have been cut - and the soldering iron tip wasn't big enough or hot enough.
@Waynemarlow
I'm not picking holes, but can I ask what size wire you've used from the cells to the BMS? I usually use 12 AWG for anything up to 30A, yours looks a bit small but could be a deceiving picture.