Huffington Post recieves millions of traffic daily and even a single article linking back to your website will boost your SERPs and website traffic significantly.
You have to send me your Page URL and anchored text after you will place the order
A contributor's post may take a while to get accepted as the website reviews the whole article before submission.
The article will be published in US edition of the Huff Post.
100% do-follow and posts will be indexed. However, I can't guarantee if it takes an hour to index or 10 days to index. It is totally out of my control and something that is dependent on search engines. You can force index if you want links to index quickly but I will never recommend force index.