There isn't much substance to speak of in this post.
Circle is a reputable company with reputable backers.
True that you don't control your coins in they are held by a third party like Circle or Coinbase... but there are a large number of people who prefer that due to simplicity.
Circle will likely increase adoption and help Bitcoin a great deal.
I've been to the HQ, I know the CEO, I completely trust them with my Bitcoin or fiat.
People do not like the fact that circle could lead to somewhat centralization of bitcoin
