Pros: You don't have to buy one.
Cons: The whole package.
I've listened to the Triport on several occasions.
The first time was memorable - I was convinced that a vandal had damaged the drivers of the display unit. Surely, they could not sound this bad.
So I went to another pair at the store. They sounded just as bad as the first. So were the third and fourth pairs. I wasn't expecting anything great from Bose, but was surprised at how poor these sounded. Even the free Buds that come with an iPod sound better.
The Triport is muddy and awful down low. The mids are recessed and unappealing and the highs are practically non-existent. There are no good qualities to these headphones. If you're in the market, buy something else. There are dozens of other headphones that offer great sound and enjoyment at a lower price.