Hello there,
I won't waste your time by writing an essay here, but here are some quick reasons why I tihnk I'd be a good fit for this project:
1) I'm a native English speaker. I was born and raised in the UK but I frequently write in US-English, so I can write in any style of English that you require.
2) As you'll see from my profile, my reputation on this website is excellent. I work on projects until the employer is satisfied with the final product.
3) I have plenty examples of my writing, both from freelancer and elsewhere, including the multiple blogs that I either run myself or contribute to regularly.
If you have any questions or simply wish to discuss some aspects of the project with me, please don't hesitate to get in touch. It should be noted that I work very strictly with the freelancer milestone system, especially when first working for a new employer.