Pros: Engrossing sound and good isolation
Cons: You will get run over by a speeding truck
These are not the final word in isolation, but coupled with their ability to play loud and to entertain, they might result in you forgetting that roads are dangerous and normally noisy.
The sound quality itself is great, like its older brother, but the bass can be a little like it's only one note. If you use these outdoors, you'll be shocked at how good they are for a portable, and they may make you reconsider whether IEMs are the best choice. They also look pretty funky in a WW2 headset sort of way.