I think that becoming a good writer is all about learning your craft. So if you use a "Pay for," editor and it helps. That can only be good.
I personally have had JJ edit my work 3 times and each time I'd improved from the last edit. I didnt think, 'Oh this will be so good, he'll sign me up straight away.'
It's just a learning curve for me and it's been worth every penny.
I am currently re-drafting and will approach JJ next year for another round of criticism.
