I have been using this for a few weeks now, full disclosure is that I have no paid yet and got given a free month.
Honestly it is a pretty good spinner, I will not mention the competitors here but I have a long term sub to at least one other AI type spinner and the results from Word AI Turing spinner were generally better quality. In fact during the SEnuke XCr launch I was using this very effectively spinning peoples press releases and re-issuing them as my own

...
Right now I am using this to spin titles from existing line spun content, and it is doing an excellent job at this... to the point I am hardly bothering even to check it now. For instance at maximum settings XCr will only generate 20 high quality titles at a time, pop those 20 through WordAI and instantly I have 100's .. I have run these same titles through both TBS, SEnuke inbuilt spinner and one other AI spinner and Word AI was easily the best, the other AI spinner was acceptable but both TBS and SEnuke inbuilt were not (TBS will be fine if you run it manually, but that takes time).
I have found a few errors, reported them in and they have been fixed.
The price is going to be the hard part for most people I know... we are all so used to getting so much often for so little that $50/month seems high... but realistically if I get a few hours use each month out of it then it has paid for itself. Perhaps more long term plans will be available when fully launched?