I've been using a $150/mo spending limit on Azure for maybe two years now, and I can go on record stating that it is extremely accurate. They're really good about showing me a breakdown of exactly where every cent I'm spending is going over time, and the second it hits $150, Azure automatically shuts down all related services and stops charging me.
There are a few Azure services to which the spending limit does not apply, but as long as you know what they are then you can choose to use them on your own volition.
There are a few Azure services to which the spending limit does not apply, but as long as you know what they are then you can choose to use them on your own volition.