Pros: Faster delivery, headphone sounds great. Beats paying $300 for a pair of Beats.

Cons: None so far.

Overall Review: If you had to install the battery, put your thumbs at 10 o'clock and 4 o'clock position, press down slightly and turn counter-clockwise to open.

Pros: Cheap

Cons: Worked for six months with light usage. Copied files from one computer on flash drive to transfer to another. When plugged into second computer, Windows said I have to reformat the drive. Windows can't reformat because the flash drive is somehow locked magically.