Pros:

• As someone who likes to listen to podcasts while I work out... and I work out in different areas, this would really suit me... I hope they can get loud!
• Looks like you can purchase as many pairs as you like and sync them all up.

Cons:

• I couldn't find a website on their kickstarter or indiegogo page... they should be available now.
• The project owner said they were changing the name, but no idea what they're changing it to... hard to find.