As @joshuad11 answered already, there is a flood of pending similar products in the pipeline.
I own the Soundbuds Slim now and use them daily, and for me their primary benefit is they do a very good job of staying in the ear, the mix of the shape in the ear from the hook and also their lightness. My biggest gripe is battery life is not as high as I'd like but then a bigger battery = heavier = more tendency to fall out.
So my most recent fave best friend ever is the Soundbuds Life, they have amazing battery life, I use them as much as possible now and then switch to the Slim for when I need the lightness so then they have both more time to recharge and they last perfectly long enough.
At a typical discounted price of $20 the Slim are highly recommended, there isn't that much wrong with them you'd want to pay more $ for.
If you look at my posts you will see I am critical of Anker, pushing them to make better products, so for me to complement Anker on a product is a weight.