Great Sound
First thing i noticed was how great the sound is, and I was coming from decent in -ear phones. But dual driver definitively shows it's strengths.
The fit is quite comfortable, at first I was worried that without a soft rubber or foam piece, they would fall out, but they have quite stable and stay put while running/biking. it took a while for me to get used to not having something jammed into my ear canal in order for it to stay. With these you almost forgot they are in your ear which is awesome. (duhh, they are custom built for your ear:)
The cable braid is very solid, much more substantial than even other expensive earphones I've had. ( I prefer it to Bluetooth), but i did have to attach a shirt clip.
One disappointment is that I was really hoping to use these with a motorcycle helmet, but they are slightly too big and with helmet they painfully squeeze against me ears. I will have to find another solution.
Thanks for a great quality product.