For me, no not really. I will use them until I get something more efficient for sure. And honestly, I'm not entirely sure
I'd even buy an S9. I've read a lot about the problems they are prone too as of late. Also, I'm beginning to see BITMAIN
as a corporate monster more than anything. I have no problem giving my business to a company that's getting their foot
in the door, if it takes a little from the greedy companies. Pangolinminer is squeezing every last bit out of 28nm technology
and made a decent machine doing so. Hopefully they have an R&D working on something new, that's alittle more efficient.