My main concern with picking GCP would be that Google has a history of shutting down projects. I feel like they are more likely to shutter GCP than Amazon is with AWS.
``Google Cloud CTO Urs Hölzle has said publicly that `One day, this could be bigger than ads. Certainly, in terms of market potential, it is.' Diane Greene now leads the division that includes GCP---from our perspective it’s nice to know that the cloud division has a seat on the Google Board of Directors.''
It seems that if Google believes in GCP being almost as big as AdWords, the likelihood of GCP Compute being shut down is as likely as GMail for Business being shut down. Not saying that it couldn't happen, but with Spotify and Quizlet using GCP instances, I find it highly unlikely the compute platform would go away, especially with paying users. A free product on the other hand could die on a whim.
I think if they demonstrate that they dogfood it the way Amazon does it will go a long way. Based on talks I've seen I know some internal teams use it (or at least did when it was free for them).
We don't talk about our own usage a lot, because we mostly care about customers (like Quizlet!) talking about their usage in their own terms. However, I personally worked with Chrome's Clusterfuzz team when we launched Preemptible VMs (https://cloudplatform.googleblog.com/2015/05/Introducing-Pre...) and they're still there today.
Disclosure: I work on Compute Engine (and launched Preemptible VMs).
http://www.cpcstrategy.com/blog/2015/08/amazon-product-ads-d...
http://www.cpcstrategy.com/blog/2015/10/amazon-text-ads-disc...
http://www.cnbc.com/2015/09/09/amazon-discontinues-disappoin...
http://uk.businessinsider.com/amazon-discontinues-amazon-ele... :)