Honestly, this doesn't read like much of a recommendation to me. I think a native English speaker would probably write "I always check my article with it befor

Honestly, this doesn't read like much of a recommendation to me. I think a native English speaker would probably write "I always check my article with it before publishing" - reversing the negation avoids the awkward "never forget to". Meanwhile, that last sentence reads like perfectly reasonable conversational English to me: omitting the "the" emphasises the "High price point" part. It seems that Grammarly will help you avoid the very common ESL type English errors (missing definite article, verb-subject agreement etc etc), which makes it worthwhile for many people, but it isn't going to get you over that final 'native speaker' grade hump.