Most of the non-native English speakers face problems of the language and style in their papers, this leading to high rejection rates. Many commercial services were launched recently, their prices and quality of correction varies a lot. Can someone suggest a service with reasonable price and high quality of correction especially in the engineering, agricultural, and mathematical fields.
I tried Edanz service for two papers, the first was very good, while the second was below marginal. I think it depends on the prof they cooperate with.
http://www.edanzediting.com/