I deployed a small node app with BlueMix. I did not use many of its advanced features, and it was relatively painless to get things running. I would consider using it for a bigger project in the future.
I really like the design on desktop, it is crisp and very clear.
It's nowhere near as nice on mobile though which is a shame.
Cool, but they're grouping startups and established tech companies together under the umbrella term "startups"