WordAi +1
pros - human readable content,user friendly interface, bulk spinning overall good for tier 1 tier2 ( Ofc youhave edit a bit before publish), seo score + cityscape.
Cons - price ( 350/yr)
Kontent machine - tier2 tier3 article submission, blog post subs. No good for tier1 (even for tier2), to archive article generate
There are plenty of free tools/decent price tools available which are far better than these three imo.