This is my first option to get articles written when I know what I need and I need it quickly.
I love how I can set very specific requirements and then get my content on the same day! You can also adjust budget to lure in better writers and refuse poor quality content so I don't get why people complain about "quality" here.
Maybe they need to learn how to communicate their needs or they are aiming at the lowest possible price which only attracts novice writers.