I do use Google Compute Engine, but the pricing on the page is extremely confusing...This is for developers who understand how things work so it shouldn't be that confusing. The page you mention has a 'Try it for free' but brings me back to the sign up page and it only mentions the $300 credit for 12 months.
So it's unclear what I'm signing up for...and I need a credit card so Google can confirm I'm not a bot? I have the same problem with using the Cloud platform...I have to search google to find anything like the firewall/networking/billing etc...