I'm a bit late to the party but our experience with Now:
Great concept for microservices, definitely something you should strive for.
But.. the hosting itself... constant outages, problems and issues at least once a month.
A few times there were like half-day long outages.
Once I've tried deploying apps and completely random websites started popping up on the deployment URLs. Imagine you deploy an update to your client's website and there's a porn site instead suddenly.. shivers.
Trying to get help from their support team usually starts okay but you will be lucky if they ever actually get back to you or admit they have a problem.
All in all - great for experimenting, maybe take an inspiration from the way they do things, but definitely don't use with important live apps.