Not so sure
We went with CloudStack for now.
Also, because Mirantis was way to expensive (AFAIK).
And generally, OpenStack was and is too much of a moving target.
Our deployment isn't that large currently - we'll see.
Open Stacker Mirantis CEO, Alex Freedland, has given out an anti-Amazon message: “Our outstanding growth is reflective of the huge market opportunity we have in front of us. As AWS continues disrupting the $150 billion dollar cloud infrastructure market, OpenStack will rise up as the only viable open source alternative.” It’s …
A project I have is currently on a VPS and I've been looking at the various cloud options. The one thing I absolutely hate are companies who aren't clear on their pricing. So Mirantis falls in to this area for me, so I'll avoid them because of that.
Then again, if you have to ask the price of something you probably can't afford it.