First of all this is a great and convenient product, and indeed helped me a lot during my travel.
The build is solid in terms of most parts but not the Asian 2-pin adapter, for some reason it breaks after only 3 times of usage (the green 'hooking' button broke so can't hold the 2-pin out)
Maybe it's just bad luck for me but for this price it's not surprising. I'll still purchase a second one of this next time before travel though.